Malicious PDF — malware analysis report

Static analysis result for SHA-256 0577462e8cc5dc86…

MALICIOUS

PDF

108.7 KB Created: 2020-08-04 23:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ad7495d588b579f1529589f3363b98a SHA-1: bd2f5f00a81afcb3807631786bd03aafc801544a SHA-256: 0577462e8cc5dc86531301c9504052db05d3c524280d45b95095e112435fa12e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, contains the same URL as a primary finding. This suggests the document's primary purpose is to direct users to malicious infrastructure, likely for phishing or to download further malware. 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=benzodiazepine+withdrawal+syndrome+pdf
    • http://files.mizzellesstandardpoodles.com/uploads/1/3/2/7/132740586/2980471.pdf
    • http://files.killettecomms.com/uploads/1/3/1/1/131163666/wajojalop-fagujusabu-wepef.pdf
    • http://files.mgss.com/uploads/1/3/1/3/131398278/1542860.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/5328/4519/files/pandas_time_series.pdf
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/52042457935.pdf
    • https://cdn.shopify.com/s/files/1/0437/8719/0430/files/sebidisajibodelujomav.pdf
    • https://cdn.shopify.com/s/files/1/0433/4275/8056/files/98122243179.pdf
    • https://cdn.shopify.com/s/files/1/0432/5353/0788/files/menulejudojibixiva.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/79686942930.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3294/files/rilonuji.pdf
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/39097687264.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lipowu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/jingle_bell_rock_chords.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/blood_hunter_2._1.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/bumuwasomigiwumijiwa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015e1e.bin
947723a9264aeee92eb3df15af9e15b8d4bb74ac8e0b17a6a57b499f2758d684		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E1E 5364 bytes
font_01_sfnt_off00017041.bin
6e321d9177bff4a5f23737d7ff9389fea60eb8e2cb2dc080c8bae44b197ae9b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17041 11344 bytes
font_02_sfnt_off000196fe.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x196FE 4324 bytes

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