Malicious PDF — malware analysis report

Static analysis result for SHA-256 035af313157c86a4…

MALICIOUS

PDF

42.0 KB Created: 2020-08-30 05:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9097c64e23aede9de7ffd12790224fa1 SHA-1: ad5a245b515d7252cf758237845b04f0773b9a36 SHA-256: 035af313157c86a454383582c05bbc3c81d930a651a3f6b04636e928c50379ed
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier as malicious and contains a high number of embedded links. One of these links, 'https://ttraff.ru/wix?keyword=chrysler+200+convertible+till+salu', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous links, including one to a malicious redirector, indicates an attempt to direct users to harmful content, likely as part of a phishing or scam campaign.

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.ru/wix?keyword=chrysler+200+convertible+till+salu
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_28a425e369a54c39bbb2a8fcb70a94a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b65901dd59a241eaa4aa068040591833.pdf
    • https://static.usrfiles.com/ugd/a44510_d2b2b84f67744a8a9baaadfc8c2695e1.pdf
    • https://static.usrfiles.com/ugd/c068f8_253cc2e5b5c04541b990f527c17c8663.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1750/files/itinerary_example_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/4687/8882/files/xupigunexijodasa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/dirojatil.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/zajiko.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/boxonixojot.pdf
    • https://static.usrfiles.com/ugd/2486b5_9afe217ced61492aba5e87de2b50ade7.pdf
    • https://static.usrfiles.com/ugd/b8c837_15f6d476237140a09f7b6bb1f7149c77.pdf
    • https://static.usrfiles.com/ugd/3b7182_6cceea83a62845d79ecfc81784deaabc.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_9b48504720c1441baceaae28c59a02b0.pdf
    • https://static.usrfiles.com/ugd/a18aa6_36d0a404d7b3493ba9fa63a4850a3735.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7e6f87a5bd543868fb6083edc707b68.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d963c41c3254c718a19e9826dba365e.pdf
    • https://static.usrfiles.com/ugd/bb13a2_26ca72eb6efb482eb4b1c737fca9107c.pdf
    • https://static.usrfiles.com/ugd/12f4eb_f09d220211084e128ec1c6f809dbf903.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c106e07f52c403bb00a9ab8189df849.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_off00005d4b.bin
58b6dc7d9272f793732fd669c256905bdf7d4c851506aa879755312084e1bf1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4B 5368 bytes
font_01_sfnt_off00006f85.bin
f1fa378da71ad272e4341b485bc064d2d3c3d8d737d6793c6a838239331c00ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F85 14052 bytes

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