Malicious PDF — malware analysis report

Static analysis result for SHA-256 47207ae519d48ae0…

MALICIOUS

PDF

44.0 KB Created: 2020-09-01 20:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25ac057a6808fd5026848a4c9c32786b SHA-1: acbdef702b0a44a98fc154c37807335e03aaa4f1 SHA-256: 47207ae519d48ae0ec255523755641a0ced5c8adcd02fe4da73a402e3fe1d4ac
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the text 'Cooperate synonym formal' and the malicious URL, suggesting a social engineering lure. The presence of numerous other PDF links, many hosted on Shopify and static.usrfiles.com, indicates a link farm strategy, likely for SEO poisoning or to obscure the ultimate destination.

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=cooperate+synonym+formal
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/22099254319.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/mokobuvifametegoxuwexole.pdf
    • https://cdn.shopify.com/s/files/1/0438/2690/5245/files/dump_meals_lady.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0861/files/biwivomuxirego.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6239/files/tanatologia_unam.pdf
    • https://static.usrfiles.com/ugd/b8c837_500c088eeb4d41eead413b466081c06f.pdf
    • https://static.usrfiles.com/ugd/f65175_09697fb35bfd4d20bed1a5301f5aad92.pdf
    • https://static.usrfiles.com/ugd/238140_52f47d6f65124318a838053c6a6d0903.pdf
    • https://static.usrfiles.com/ugd/221f3a_c74ad4d83c54485a94e9ff8374fff91a.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/atomic_history_timeline_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/1300/5724/files/benefits_of_exercise_on_mental_health.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f53ec0b69594ddd80c7ee7099861fe4.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_509058057c264c42b40dfbb358f8f52e.pdf
    • https://static.usrfiles.com/ugd/b8c837_072b4975e4c64ac4a3ebded16938a1e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_07194948e0f94b1e95d745f6ae29c3ba.pdf
    • https://static.usrfiles.com/ugd/37321e_236309b03b1d4185b0a0fc91d8e18a75.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_off00006184.bin
03a1d4f124857125480877f3db55e286d162a2015193fdefe23788011bd412b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6184 4912 bytes
font_01_sfnt_off00007223.bin
538c12890401cf61e134e82a68a4159d17d3d29a0b2493ab917b1318a2210631		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7223 10156 bytes
font_02_sfnt_off000094e6.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94E6 4324 bytes

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