Malicious PDF — malware analysis report

Static analysis result for SHA-256 76eb06e253c43484…

MALICIOUS

PDF

44.0 KB Created: 2020-08-19 22:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 352fe509fdaf5fa981980419055794c0 SHA-1: f427837e8271a3a00daa096d1d9cdeb249e3be74 SHA-256: 76eb06e253c43484448624b1ef5871621e66a42d468ba03204d93b1441c606ad
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. It also exhibits a PDF link farm heuristic, containing numerous external PDF links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The embedded URL 'https://ttraff.ru/pify?keyword=blood+stain+child+amateras' is the primary IOC, likely serving as a lure to further malicious content.

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/pify?keyword=blood+stain+child+amateras
    • http://dapofudul.uoflphisigmarho.com/uploads/1/3/0/7/130740497/8d694.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/7895/0810/files/36908513932.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/zilifofomidakegesole.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/86344953774.pdf
    • https://cdn.shopify.com/s/files/1/0435/1534/7103/files/gran_canaria_bus_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/sofasufowi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5263/files/29550720146.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3162/files/79313093593.pdf
    • https://cdn.shopify.com/s/files/1/0432/1493/0084/files/how_to_get_ankle_breaker_badge_2k16.pdf
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/sinosetirejomosusuda.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/2984/files/zalejuwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/rutixovo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043a0.bin
2b43bc8db197bb6eeeb5e02160cf24465622cb73a05d9858241a8c4570523606		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43A0 9080 bytes
font_01_sfnt_off000061c0.bin
9ed761410d383e928bc9901d03b2a72973a34249d9d93abba1cf6f70f3a9096f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C0 5016 bytes
font_02_sfnt_off0000728d.bin
6248d00b7b99c0bd61fe3ed7931f51983266a6e11eab70861fec8645f3721b78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x728D 10052 bytes
font_03_sfnt_off00009518.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9518 4324 bytes

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