Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d660bccbcf08f22…

MALICIOUS

PDF

42.3 KB Created: 2020-07-08 12:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 5e4b361021e09f7d6e0deead58a40665 SHA-1: 2aa6e33a91a67a40584086a861dbda3013a368a5 SHA-256: 9d660bccbcf08f220f8691f271ef2bd6f439207ad69de6821011d65041db4d04
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, many of which point to disposable hosting and appear to be part of an SEO link farm. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though partially obfuscated, contains text related to software downloads and includes URLs that likely lead to malicious content or further redirection. No scripts were extracted, but the extensive link farm and redirector activity strongly suggest a malicious intent to drive traffic to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=convert%20pdf%20to%20powerpoint%20software%20free%20download In PDF document text
    • http://files.edsworldwide.org/uploads/1/3/2/7/132740320/sotilemiz-gukixedesimujar-bevulas-lativeponeji.pdfIn PDF document text
    • http://files.5ivezero.com/uploads/1/3/1/4/131437538/boxuzuzege-jamov-susaxozokusonir.pdfIn PDF document text
    • http://files.quitosltd.com/uploads/1/3/2/6/132681938/5b6a0c74.pdfIn PDF document text
    • http://files.parkcityea.org/uploads/1/3/0/8/130874110/nurovarogokiwa.pdfIn PDF document text
    • http://files.journeystoflavors.com/uploads/1/3/0/9/130969555/a18860d033.pdfIn PDF document text
    • http://files.itrpath.com/uploads/1/3/1/4/131406295/baxixirinewasutolize.pdfIn PDF document text
    • http://files.mychildstherapy.com/uploads/1/3/1/0/131071035/f73f22.pdfIn PDF document text
    • http://files.lifewisegifts.com/uploads/1/3/0/8/130874128/6ab8d3.pdfIn PDF document text
    • http://files.didsburyjuniors.com/uploads/1/3/2/6/132681824/maxipupamekep.pdfIn PDF document text
    • http://files.yashbangera.com/uploads/1/3/0/7/130738625/83486b04a35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rilusepo.files.wordpress.com/2020/06/midabufavedewu.pdfIn PDF document text
    • https://mexutux727649879.files.wordpress.com/2020/07/benetifupiferarep.pdfIn PDF document text
    • https://zopudide.files.wordpress.com/2020/07/46746001857.pdfIn PDF document text
    • https://zarenorazer.files.wordpress.com/2020/06/17727687158.pdfIn PDF document text
    • https://pexibirivuk.files.wordpress.com/2020/07/garalakexelematix.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://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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6929 4996 bytes
SHA-256: 6972bb10e4e759b33fec6fc29b8c3f3f33db85748d95e3b58d865ada1efc6251
font_01_sfnt_off00007a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A48 9896 bytes
SHA-256: e1acbf262540c6299d3e7e9994451d3e6427a7a0fadf76ea9ece3f68b23fc3f4

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