Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c294544a61f3d4…

MALICIOUS

PDF

40.0 KB Created: 2020-08-07 19:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d0be0da131355f9e80de74abf34aa70 SHA-1: 31dc2655f50fca856a34d8866d2005a9c55726c7 SHA-256: 12c294544a61f3d4280af0114c82e6dc2dbf385e6625ded37540a7d212400925
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to Shopify domains, but one critical URL, 'https://ttraff.cc/pify?keyword=simile+and+metaphor+worksheet+grade+4+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, includes text suggesting it's a worksheet, likely a lure for SEO poisoning or traffic redirection. The ML classifier strongly indicated maliciousness, supporting the attack pattern of luring users to malicious sites.

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.cc/pify?keyword=simile+and+metaphor+worksheet+grade+4+pdf
    • http://nupevu.triprint.net/uploads/1/3/1/6/131606490/26271cf.pdf
    • http://files.normawalton.ca/uploads/1/3/1/3/131380440/supenofalinu.pdf
    • http://sibelar.megswish.org/uploads/1/3/1/4/131409090/jegutitimivezabulew.pdf
    • http://files.therapeutic-connections.net/uploads/1/3/0/8/130874559/wutoketapojobosig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0349/3028/files/nirisuluxaxitaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/1085/0979/files/15170741261.pdf
    • https://cdn.shopify.com/s/files/1/0433/9263/0940/files/kilifomipawoporidobofed.pdf
    • https://cdn.shopify.com/s/files/1/0436/6493/3014/files/31516515275.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3609/files/jilakutu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/10603082361.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/xageradasidusesasad.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1218/files/10984287244.pdf
    • https://cdn.shopify.com/s/files/1/0432/4445/4056/files/gidobufomomi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/temufaxilagig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vukabisozudetilo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/tryndamere_jungle_season_7.pdf
    • https://cdn.shopify.com/s/files/1/0431/6974/2999/files/dusufed.pdf
    • https://cdn.shopify.com/s/files/1/0430/0763/9711/files/61505084018.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_off00005d15.bin
74c817ebe05e0a85ec5bc056c7273a0c35c5e74e2793d08f98cc3f76bb9bd893		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D15 5800 bytes
font_01_sfnt_off000070b6.bin
9228a74ba8583eede87f6e6e4550349806eba7392174fb7d387d9474c2d4a36c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B6 9980 bytes

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