Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ccec8e53f0a7cf…

MALICIOUS

PDF

43.3 KB Created: 2020-08-30 23:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d286d43fb43096bfc86cd1b0dbf9f503 SHA-1: e29c143d4e6781c9c2071dd67f4287f19ea1db09 SHA-256: 08ccec8e53f0a7cf72d66686d27ac26cc807bb5afdf779e40505d52ad812f66a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of many external links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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.club/wix?keyword=foundation+science+physics+for+class
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://static.usrfiles.com/ugd/cec570_978ee0a79ea34829a59db8f9a1e0647a.pdf
    • https://static.usrfiles.com/ugd/7041e4_4b502281d5954f1980c4f4616140970d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4b69441f96a47b79972ecdbdb90ab30.pdf
    • https://cdn.shopify.com/s/files/1/0453/2836/7771/files/representation_theory_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/nypd_cas_5.pdf
    • https://cdn.shopify.com/s/files/1/0435/9749/6488/files/keto_diet_what_not_to_eat.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4975/files/nelan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijev.pdf
    • https://cdn.shopify.com/s/files/1/0434/3670/3900/files/genaloxozetanagatejesinob.pdf
    • https://cdn.shopify.com/s/files/1/0436/9701/2890/files/71879140026.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/84844279301.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/74783305418.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/banajoro.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005db0.bin
2ee5f98a8a59ae541a4eb229af841aeccb58ed81e0a7615a29e7aef291c968fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB0 5300 bytes
font_01_sfnt_off00006fbe.bin
237190f4a84e34fec83ba477fbb8f3ee79949ebbb7c9f6d8b4d4bd1920153b92
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBE 10128 bytes
font_02_sfnt_off0000929f.bin
37d4759943f78fb11e84434254bc63e043243a72e2c666b7d4a510dfc7f46ae6
pdf-font-stream PDF embedded font (sfnt) at offset 0x929F 3452 bytes