Malicious PDF — malware analysis report

Static analysis result for SHA-256 4211606b0e2b0cb2…

MALICIOUS

PDF

58.8 KB Created: 2020-08-08 13:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6d34fe0735a8cb32bd06c9ff647d68e SHA-1: 36054be4c59408af844dc130a78bfd3bb5a1282c SHA-256: 4211606b0e2b0cb2988f40447f95268d7d63d14642268c0d90317c111617b6dc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirect URL, suggesting the primary intent is to lure the user to this malicious site.

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.com/pify?keyword=iot+building+arduino+based+projects+pdf+download
    • http://kosik.leticiahuerta.com/uploads/1/3/1/8/131871699/zapuxodoxutes.pdf
    • http://dutemed.amazingstarsacademyunited.com/uploads/1/3/1/1/131164250/9705823.pdf
    • http://ruvux.freedive305.com/uploads/1/3/1/4/131407406/basuwezoguzi_vidokilozet_ronawejigaxibup_nufazi.pdf
    • https://cdn.shopify.com/s/files/1/0439/5863/2606/files/luginonejipelowo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/nidulefakonezigel.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/nefonige.pdf
    • https://cdn.shopify.com/s/files/1/0437/5196/4830/files/61167599221.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4154/files/31859198802.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/85793904695.pdf
    • https://cdn.shopify.com/s/files/1/0441/0766/1464/files/bmw_warning_signs.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/wunawurefa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3674/files/pizzaiolo_menu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mosagewenusuwaguxizekud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85986419962.pdf
    • https://cdn.shopify.com/s/files/1/0430/3886/7607/files/natovo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a65d.bin
712676ea385d59bf551093eaca96cd194b75028d934859d7307425ddedd2affc
pdf-font-stream PDF embedded font (sfnt) at offset 0xA65D 5568 bytes
font_01_sfnt_off0000b96d.bin
afba3d09878e0a14a22ced0b370299cb7d202849c597209a5fc317e5be0a14a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xB96D 10924 bytes