Malicious PDF — malware analysis report

Static analysis result for SHA-256 2994e860faebde6f…

MALICIOUS

PDF

38.2 KB Created: 2020-08-08 01:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 107057533336ab87b9228b8fa3088e52 SHA-1: 68a08ac062b7401d31866d82bdd157d93b6513b2 SHA-256: 2994e860faebde6f131e1052ba81f9ea0ec329818aca3328aaf9e7fbd47abc8a
162 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for malicious redirector links, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a book PDF. The presence of numerous embedded links, many pointing to Shopify, suggests a link farm designed to distribute malicious content. The ML classifier also strongly indicated maliciousness.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pify?keyword=bharat+acharya+8086+book+pdf In PDF document text
    • http://runemi.susanbibulaphotography.com/uploads/1/3/2/7/132741555/2426407.pdfIn PDF document text
    • http://files.teamenzoprogeria.com/uploads/1/3/0/8/130874162/ee2723a042bb.pdfIn PDF document text
    • http://files.vixnglam.com/uploads/1/3/1/8/131856205/gurilate_sukeke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1688/7192/files/bba_llb_calicut_university.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7706/6135/files/diablo_3_2._4._2_patch_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/1754618555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4376/3862/files/17298999124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0053/4952/files/38638399157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3869/3797/files/25205741184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/79799245537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/kiwemajigogosesogiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/50498475466.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_off000053de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53DE 5876 bytes
SHA-256: 8124ba2e83c9face1ea1dc01e66a247bc9b6eae631a42e6844ebae7b5f853af0
font_01_sfnt_off000067dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67DC 10724 bytes
SHA-256: f297c01a01beb89772ad1f7a02b5ef851e422dff490ee115be2517896d2fb6b0

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