Malicious PDF — malware analysis report

Static analysis result for SHA-256 06310c96a6466a06…

MALICIOUS

PDF

43.0 KB Created: 2020-09-29 18:36:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 870a41ba2332692c63030c1aa3d6dfdb SHA-1: 646ffd051752b4196ffec363f13360f96c1eb7e3 SHA-256: 06310c96a6466a06913979dce2f65b0f5b1fa15ca24ca4a01ce6d04c2bcb5e3c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO abuse. The document body, though partially corrupted, contains text and URLs that align with the observed malicious link patterns.

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://cctraff.ru/strik?keyword=common+barriers+to+learning+pdf
    • http://files.dglanded.com/uploads/1/3/0/7/130738758/5105642.pdf
    • http://nilopafu.helpinghandshandymanllc.com/uploads/1/3/0/8/130873759/jifiri_fasirujadizopa.pdf
    • http://files.suisekirocks.com/uploads/1/3/1/3/131381772/zulowabidatazovuw.pdf
    • http://files.applebeechurch.com/uploads/1/3/1/1/131163712/6230672.pdf
    • http://files.teachinglearningalliance.org/uploads/1/3/2/7/132740327/5820470.pdf
    • http://bunir.lynncoop.com/uploads/1/3/0/7/130775540/joxejokoko.pdf
    • http://files.trilolab.net/uploads/1/3/1/3/131383657/866560.pdf
    • http://titev.researchingthewest.com/uploads/1/3/0/8/130814873/4769bd4a12.pdf
    • http://rugirev.flopinions.net/uploads/1/3/2/8/132814940/kigojetozav-juwuzatupojugi-furizusixanasek.pdf
    • http://sijodif.baileysea.com/uploads/1/3/0/7/130740444/kugujekobigazar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5938/8320/files/16102078610.pdf
    • https://cdn.shopify.com/s/files/1/0438/5056/3734/files/xutojem.pdf
    • https://cdn.shopify.com/s/files/1/0484/6809/9234/files/73039288079.pdf
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/cubiertas_autoportantes.pdf
    • https://cdn.shopify.com/s/files/1/0465/3006/8630/files/8720903989.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_off00006ada.bin
515904b3f0314c1d37525710eac4d8479c9eecf6e99536bc4f4d82afa8e11075
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADA 5404 bytes
font_01_sfnt_off00007d14.bin
192ed7a0b14cc7ff38b8fb98adf151ad8fe241a8eb5acb951e53f30cfa81b6df
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D14 9996 bytes