Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ddbd267f8442916…

MALICIOUS

PDF

64.0 KB Created: 2020-07-08 23:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: b9da31dfb849b23245163028bd574d56 SHA-1: ef3792e5739384f06761197acd7699a50330e1d8 SHA-256: 4ddbd267f84429167b024a2b4eee662a28c2e2a98f39c6674de114f65f982cfa
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic firing indicates a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wb?keyword=carl%20sagan%20pale%20blue%20dot%20pdf, suggesting a lure to a malicious site. The overall structure points to a link farm or redirection attack designed to lead users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wb?keyword=carl%20sagan%20pale%20blue%20dot%20pdf In PDF document text
    • http://files.guyingram.com/uploads/1/3/2/6/132681596/3295852.pdfIn PDF document text
    • http://files.ppgcosmo.cosmo-ufes.org/uploads/1/3/1/3/131397934/8372480.pdfIn PDF document text
    • http://files.zanyunoodles.com/uploads/1/3/0/7/130739381/sikete-wemotuta.pdfIn PDF document text
    • http://files.appletreecontractors.com/uploads/1/3/1/6/131607712/9709263.pdfIn PDF document text
    • http://files.zamdevelopsj.org/uploads/1/3/1/1/131164534/7449164.pdfIn PDF document text
    • http://files.mskhor.com/uploads/1/3/2/6/132682570/fewogedawox-xabuguj-dajelenudunexo.pdfIn PDF document text
    • http://files.papermagicbook.com/uploads/1/3/1/8/131860787/nelakojopotazedi.pdfIn PDF document text
    • http://files.sherieunfiltered.com/uploads/1/3/2/8/132815961/a59b4b501cc8.pdfIn PDF document text
    • http://files.mymslifestyle.com/uploads/1/3/0/9/130969887/xisazux.pdfIn PDF document text
    • http://files.paiboon.biz/uploads/1/3/1/4/131406762/1208977.pdfIn PDF document text
    • http://files.donerightpoolheating.com/uploads/1/3/1/6/131637850/biditol_robelixude_xotizogi.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wisixabapux.files.wordpress.com/2020/06/kixejalez.pdfIn PDF document text
    • https://daxedugaso.files.wordpress.com/2020/07/93020521976.pdfIn PDF document text
    • https://tolefeguxi.files.wordpress.com/2020/06/wivalupasotufidajub.pdfIn PDF document text
    • https://susuloteteze.files.wordpress.com/2020/06/guwukisovunuxe.pdfIn PDF document text
    • https://tujirejon.files.wordpress.com/2020/06/jotekaralopeku.pdfIn PDF document text
    • https://kakonowa.files.wordpress.com/2020/06/47697341981.pdfIn PDF document text
    • https://limowuzeram.files.wordpress.com/2020/06/pevokutim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86372263330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pekazojifedabefotekufof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lafiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2857609843.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00009853.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9853 17220 bytes
SHA-256: 8d5951f8ed4f32d04e379b2494d5dc2c5ac19ff7768bc21d64e7315f1dbd3751
font_00_sfnt_off000086a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A7 5204 bytes
SHA-256: 4012a437d3ee16d05e027dbae8b839d8b1bbf8157949047749f54135d8fe61b6
font_02_sfnt_off0000c798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC798 12736 bytes
SHA-256: ba15d0f355ea1807d44c71ef6b56ab7b197b0507a6827049dfc1f86bf9d6a796

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