Malicious PDF — malware analysis report

Static analysis result for SHA-256 0518bc6558b1d082…

MALICIOUS

PDF

45.4 KB Created: 2020-08-30 20:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7cfbb68e8940c23db579e03a5da3ffd SHA-1: eb842a45a76e3da3221ae4b733af34e12bb8f925 SHA-256: 0518bc6558b1d082fc224c64b857dc9c6ff520e10fd82521bf5089ddf561e623
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a PDF link farm pointing to redirector infrastructure. The primary malicious URL identified is `https://ttraff.com/wix?keyword=can+amoxicillin+treat+bartholin+cyst`, which is likely used to drive traffic or host malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to disguise its malicious nature.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=can+amoxicillin+treat+bartholin+cyst
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6885/9303/files/81665126063.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/favebenakazuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/3816/3623/files/11026321277.pdf
    • https://static.usrfiles.com/ugd/0c41e7_45e9bf237c0344a6ac59c148568a43bb.pdf
    • https://static.usrfiles.com/ugd/77d535_8851ee2a7f1f4242a2e32db51bdd7536.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kopamidije.pdf
    • https://cdn.shopify.com/s/files/1/0434/6894/7616/files/institute_manual_old_testament.pdf
    • https://static.usrfiles.com/ugd/1f2646_442eaec4d1ae42faa26c3935ef026594.pdf
    • https://static.usrfiles.com/ugd/6cfc61_522708c2207345feba86c523e918e7b4.pdf
    • https://static.usrfiles.com/ugd/50c35f_3192221ca2f348ec90a2cbd7b3022afd.pdf
    • https://static.usrfiles.com/ugd/24853a_3bbdd5703be24013a42c947270538158.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_off000073f9.bin
f33b7c7c17d6250eb108146533dca5c7e8ce4ed19615b604c7137b6cc8668105
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F9 5252 bytes
font_01_sfnt_off000085b0.bin
77a05767e5c90df3bb4eac639abd066c59ac9b6f82a473aa3eb1f5fc6bffe044
pdf-font-stream PDF embedded font (sfnt) at offset 0x85B0 10164 bytes