Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1abf84d7464ea12…

MALICIOUS

PDF

46.6 KB Created: 2020-08-08 21:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02b561b4abded8c7670d848fdb50d57d SHA-1: 69a4104caf9341dd4a8ecf0b10c6c66a209d315d SHA-256: d1abf84d7464ea127bfc3eef6b277f428592c9ffb7f76aa80bdf9d9da4aa77db
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with many links pointing to benign Shopify domains, but one critical link redirects through `ttraff.cc`, a known malicious redirector. The document body text and embedded URLs suggest a lure for downloading a book, which is a common tactic for distributing malware. The presence of a visual download button further supports this malicious workflow.

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.
  • 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
  • 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=automobile+engineering+book+by+vijayaraghavan+pdf+free+download
    • http://files.eastbaypreschools.com/uploads/1/3/0/9/130969673/bitewepabopijexil.pdf
    • http://lijuto.concordneuropsych.com/uploads/1/3/2/7/132740405/lojidigodeze_kuripaxemesep.pdf
    • http://jawidet.mainstylebroomfield.com/uploads/1/3/0/9/130969060/xexepixorux.pdf
    • http://files.jacquigreaves-author.com/uploads/1/3/0/7/130776490/90f57.pdf
    • http://files.limousinesdallas.net/uploads/1/3/0/8/130873876/4915274.pdf
    • https://cdn.shopify.com/s/files/1/0430/0826/2297/files/caso_clinico_aplasia_medular.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/64107256897.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/turitome.pdf
    • https://cdn.shopify.com/s/files/1/0438/1288/0544/files/92129433019.pdf
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/zexopabedojewig.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9384/files/vekimuzaxirokejafugenexe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8074/files/livabukojeki.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/simple_definition_of_economics.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/40013108883.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/nofolavado.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/jixupakolukatefexusexad.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f5b.bin
e779f1ffec019eeb5acdc654d9aeccb7cfeee910d680e7254441059873426876
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5B 5800 bytes
font_01_sfnt_off0000730e.bin
89454d8ece1be00d2333aac76955f46ed17c4d141322e635bf27f42efb43e54e
pdf-font-stream PDF embedded font (sfnt) at offset 0x730E 2116 bytes
font_02_sfnt_off00007cda.bin
4972920ed079a4aa20442d08c75084235e2b5b875209d1598ce517f7f72ffe4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDA 14532 bytes