Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6d9ec65ab87406…

MALICIOUS

PDF

41.4 KB Created: 2020-08-29 04:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31347e1ab59530c32f1a900833fdb7a9 SHA-1: e25797af2988aebc2a73c245f6798b9e6dcec179 SHA-256: 5a6d9ec65ab8740688a1c86ee1969a1af19c5b4ab3a1b23c413a3b30b71f4545
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL that is flagged as malicious, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the same malicious URL. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm designed to distribute malicious content or manipulate search engine results.

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/wix?keyword=netflix+generator+no+survey
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2693/1099/files/73432834617.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/car_game_video_play.pdf
    • https://cdn.shopify.com/s/files/1/0432/1496/2848/files/veterinary_antibiotics.pdf
    • https://cdn.shopify.com/s/files/1/0434/2710/2887/files/13566310447.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/pusojejakafufipivizi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/vopup.pdf
    • https://cdn.shopify.com/s/files/1/0438/2221/9421/files/administration_management.pdf
    • https://cdn.shopify.com/s/files/1/0437/6533/4165/files/nimulofokeloranubasefeti.pdf
    • https://cdn.shopify.com/s/files/1/0433/3302/5960/files/55474938018.pdf
    • https://cdn.shopify.com/s/files/1/0433/4531/3941/files/53264442699.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6a3ec104de940039daacf2f0f0ef7af.pdf
    • https://static.usrfiles.com/ugd/b8c837_80f57ca9716e4bd58329a20da1dbc456.pdf
    • https://static.usrfiles.com/ugd/b8c837_f601a48014ad4ce6a86afe8b1550cd5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_05c496a00f5f4ccaa839a07e28fede36.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d33dfcc10a846b6a6a1f7ad882374ea.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_off0000633d.bin
2bbc4489c9efbcb052d90375496b10962f8a6e188148af1f382e58dc46b8f9e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x633D 5132 bytes
font_01_sfnt_off000074e2.bin
d41d5008ecb36aa2c2ba5f76fd252d9ca863db85ea1c404187a14d7e38b1b04d
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E2 10500 bytes