Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c7135d19b79b9f…

MALICIOUS

PDF

41.5 KB Created: 2020-07-09 14:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 63a304cd86b6025e523c225a17fe804c SHA-1: 02c500c0ce6d623767f2adb07cce036e2085e46e SHA-256: f2c7135d19b79b9f1320699424f7912ae13f10646875b011a07130e36283eebd
184 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a redirector to known malicious infrastructure. The document body and heuristics indicate a link farm strategy, likely designed to lure users to external sites. No scripts were extracted, but the extensive use of external links suggests a delivery mechanism for further malicious content.

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.com/wb?keyword=justicia%20definicion%20pdf In PDF document text
    • http://files.wingrabrittanys.com/uploads/1/3/1/4/131438835/karalutiserubegulal.pdfIn PDF document text
    • http://files.otterworksusa.com/uploads/1/3/1/4/131437351/tasegus-rekafi-zeganusisaj-jigavulef.pdfIn PDF document text
    • http://files.thewillowworks.org/uploads/1/3/1/4/131438002/xorekezapa.pdfIn PDF document text
    • http://files.pan-disposal.com/uploads/1/3/1/0/131070196/vomuxewifexi_xajoxafad_supatefadot.pdfIn PDF document text
    • http://files.thegoodsevents.com/uploads/1/3/1/8/131871909/2948149.pdfIn PDF document text
    • http://files.microneedleregulatory.org/uploads/1/3/0/9/130969209/giwuvizalapunemaf.pdfIn PDF document text
    • http://files.loveandmercyfdc.com/uploads/1/3/1/8/131857071/tazowirujuvimi.pdfIn PDF document text
    • http://files.mizpah36.org/uploads/1/3/1/3/131379045/6624586.pdfIn PDF document text
    • http://files.lockmangenetics.com/uploads/1/3/0/7/130775383/nizejab.pdfIn PDF document text
    • http://files.ethanpeter.greatwebsitebuilder.com/uploads/1/3/0/7/130738806/5c3ba3ac.pdfIn PDF document text
    • http://files.mrbsfinest.com/uploads/1/3/2/3/132303080/wozesepivijiwox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tuxusuko.files.wordpress.com/2020/07/vaponapofazur.pdfIn PDF document text
    • https://domenisika.files.wordpress.com/2020/06/65143108946.pdfIn PDF document text
    • https://jibexijigu.files.wordpress.com/2020/07/jojuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/minirefotapobizezuloxot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bekikelazipilexujewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tokavurovapipemekimisam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000675d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675D 4892 bytes
SHA-256: 5bc2ad7bc1e9f1b77daf149f842d0af89b0c258bd92e46d293edca52016c8002
font_01_sfnt_off00007807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7807 9684 bytes
SHA-256: e807c97d4d12e6e531ba3797056704edd70487bdecdbbc9c95a0d1865af15dc6