Malicious PDF — malware analysis report

Static analysis result for SHA-256 03927041a0219d8b…

MALICIOUS

PDF

33.8 KB Created: 2020-08-24 06:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df7c3346d939fe67a5b51b7bc5d12549 SHA-1: 33e40011ff4ab8e232f6deae9d8cc854b29723f8 SHA-256: 03927041a0219d8b38594fb69d2e8f1c3b816d1dc4fed9c4a739eaac0ae10ce1
154 Risk Score

Malware Insights

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

The PDF contains a deceptive lure, presenting itself as an owner's manual to trick users into clicking a malicious link. This link redirects to a link farm, which is a common tactic for distributing malware or conducting phishing campaigns. The ML classifier strongly indicated maliciousness, and the presence of numerous external links supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=owners+manual+toyota+estima
    • http://files.kortomomolu.com/uploads/1/3/1/3/131398010/ponudulokire.pdf
    • http://files.bklnmanners.com/uploads/1/3/2/6/132681910/pafizarizogatutazenu.pdf
    • http://benusapi.yvonnegordonmoserart.com/uploads/1/3/2/8/132815758/mapagufaboj.pdf
    • http://ludoxopuf.analyticalsci.com/uploads/1/3/1/6/131637136/3cb1c4516067c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8258/7039/files/wawolijujuje.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/nomavewe.pdf
    • https://cdn.shopify.com/s/files/1/0438/0858/7936/files/english_grammar_learning_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0435/1482/2811/files/jobemadomeregefaxama.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/lutuxunuzulevuzed.pdf
    • https://cdn.shopify.com/s/files/1/0435/2186/7930/files/tubafopodiwovimaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/35774540462.pdf
    • https://cdn.shopify.com/s/files/1/0436/3704/7449/files/85870651744.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/wagawubakejepeto.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/41120767464.pdf
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/jubimusiguronob.pdf
    • https://cdn.shopify.com/s/files/1/0435/1852/5599/files/73944186894.pdf
    • https://cdn.shopify.com/s/files/1/0433/8244/0103/files/25311389110.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048bd.bin
515cc994e43360d3c6ed28870a213830808ad06628ac6ee2db37727cf1d27463		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48BD 5052 bytes
font_01_sfnt_off000059db.bin
ff6d58f30adb899f12dabed9157a4b461098728206f9046e5d5b808c2337ea06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59DB 9544 bytes

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