Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c852f6affd0a48e…

MALICIOUS

PDF

42.3 KB Created: 2020-08-03 15:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2ad0241a94b401e9eaf5c2287a97fca SHA-1: 94da3f93710da3ed6863c84272b4e1f7ddf11777 SHA-256: 5c852f6affd0a48e684f06613105d672d8da0563df080cd459b50eb05eab937b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is ttraff.com, which likely serves to obfuscate the ultimate destination of the attack. The document body itself is heavily obfuscated and contains embedded URLs, suggesting an attempt to lure the user to malicious content.

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=pursed+lips+breathing+pdf
    • http://files.sexyandhealthyshop.com/uploads/1/3/1/4/131453302/668df70f63.pdf
    • http://files.lochfieldprimary.com/uploads/1/3/2/6/132681062/409ac12355abd4.pdf
    • http://files.roadtriprip.com/uploads/1/3/1/4/131407802/rexipuke.pdf
    • http://files.jdryart.com/uploads/1/3/0/9/130969656/gisosimatuxumupadot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4411/8423/files/95861213586.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tuwupijisunuxavupo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/44094796253.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/20368440645.pdf
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/50335121089.pdf
    • https://cdn.shopify.com/s/files/1/0431/4637/9426/files/xozenulitifadipanowi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1658/5379/files/52798981234.pdf
    • https://cdn.shopify.com/s/files/1/0430/1268/5977/files/tinigedojuxigebubawuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6617/files/42341707368.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/44633192786.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_off00006845.bin
34bcb9ef9b24bc07b9c1de701e21cc0d142234d1b96e02344e62d7bc8c962f42
pdf-font-stream PDF embedded font (sfnt) at offset 0x6845 5444 bytes
font_01_sfnt_off00007ab6.bin
fe5d768322310b208d5a6ae3fd0f76e53db8ca213b3226ac92586fc55b764315
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB6 9964 bytes