Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cc33a29d59a53b…

MALICIOUS

PDF

41.3 KB Created: 2020-08-27 20:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a7ae7142533b8af2d940dba8358fd42 SHA-1: fac4371821e5e064eee6eff1c1783b7809cb9b44 SHA-256: 08cc33a29d59a53bbe365aa3073f6efa7136004d0c1a2957f417cd703bc7d42c
154 Risk Score

Malware Insights

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

The PDF contains embedded links and text that attempt to trick the user into downloading a torrent, leading them to a malicious redirector. The ML classifier strongly indicated maliciousness, and the PDF was found to contain a link farm pointing to potentially malicious infrastructure. No scripts were extracted, but the document body and heuristics suggest a phishing or malware distribution lure.

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/pify?keyword=jamey+johnson+torrent
    • http://files.tidaleffectscapecod.com/uploads/1/3/1/3/131382955/790f5924a67.pdf
    • http://ketator.heritagefloristcortland.com/uploads/1/3/1/4/131453558/6172085.pdf
    • http://files.malka-chic.com/uploads/1/3/1/3/131398100/de32ab11.pdf
    • http://xiputo.soldiershomestories.com/uploads/1/3/0/7/130739206/wafiju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/60104002322.pdf
    • https://cdn.shopify.com/s/files/1/0433/8509/4307/files/fusomirope.pdf
    • https://cdn.shopify.com/s/files/1/0429/0543/6326/files/rebukaxepisub.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/beduzoduzud.pdf
    • https://cdn.shopify.com/s/files/1/0436/5923/1385/files/zanegarowi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9966/files/wexumelaja.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7191/files/happy_birthday_mom_song_free.pdf
    • https://www.youtube.com/results?search_query=jamey+johnson+high+cost+of+living+mp3
    • 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_off00005a15.bin
6d908898bb4655363868d6a88fe7650ba3c6f69ee8f4c47b95f2772fcc75717f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A15 5060 bytes
font_01_sfnt_off00006b2f.bin
f3f01b4ab4dae7eec54d079ba226a17901a52b4589a2eaa3a33a4940627157c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2F 14748 bytes