Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c01b77e4885d068…

MALICIOUS

PDF

42.1 KB Created: 2020-08-02 03:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 549692b0c9eaddc2de5d42b9f6b055f3 SHA-1: b988ab8051f6da8eb9950a29754ea53dc83898f6 SHA-256: 0c01b77e4885d0680b468e2ac039e123093115daae638e140c72b2ff1714712c
174 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains the malicious URL and text that could be interpreted as a lure. The presence of numerous links suggests a link farm or SEO manipulation tactic, with the primary malicious link being the most concerning.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/pify?keyword=robin+spirit+animal
    • http://files.chappellskc.com/uploads/1/3/0/8/130873717/gamanudi-feditigojivi-damezidete-fatosososupu.pdf
    • http://files.tiffanynewman.net/uploads/1/3/1/1/131164351/fomegunasafegab_vekanazedul_rutotedivexisu.pdf
    • http://files.greengoderich.com/uploads/1/3/0/7/130776327/3620169.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2883/9581/files/social_security_form_w_4v.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5767/files/raxagowakibedo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/42829042794.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/rojerilavajugalisinul.pdf
    • https://cdn.shopify.com/s/files/1/0428/8646/3647/files/72876956978.pdf
    • https://cdn.shopify.com/s/files/1/0437/1290/5370/files/files_2_folder.pdf
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/54860314109.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/fajin.pdf
    • https://cdn.shopify.com/s/files/1/0434/7897/4616/files/jobawatajotunalirokexira.pdf
    • https://cdn.shopify.com/s/files/1/0437/7244/4823/files/39456042745.pdf
    • https://cdn.shopify.com/s/files/1/0438/4371/5229/files/11798743864.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5239/files/12078444116.pdf
    • https://cdn.shopify.com/s/files/1/0438/4191/2997/files/gumat.pdf
    • https://cdn.shopify.com/s/files/1/0429/3541/9039/files/wemejikikisewop.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_off00006957.bin
99f8bcc8a1d017e1816073d850487045c21674630c5f0f6fb1f2be95e088bb34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6957 5112 bytes
font_01_sfnt_off00007aa2.bin
88c21cd2c2c7d571bb5b51bfd86863089ce6d09be45b5c5cfb70a82840c70036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA2 9664 bytes

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