Malicious PDF — malware analysis report

Static analysis result for SHA-256 07264badc6ffa7fc…

MALICIOUS

PDF

40.6 KB Created: 2020-08-28 08:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c83f830cd9c1bc0082d21e740d1e5274 SHA-1: f2c76834095b30209e0d7a250c825c51f15e0229 SHA-256: 07264badc6ffa7fc588a27749965aba003d073a62065d8fbd5a6e308621d67ed
154 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a torrent download, which is a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the embedded URL points to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for further payload delivery or credential harvesting.

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.me/pify?keyword=anna+and+the+apocalypse+torrent
    • http://fosekaxem.dixborovillagegreen.org/uploads/1/3/2/7/132740494/kukitida-jojukesuxib.pdf
    • http://files.rrgroup.agency/uploads/1/3/1/4/131406434/95909f968fbe.pdf
    • http://files.gmsactg.com/uploads/1/3/1/8/131872286/guzuwutiluvejop.pdf
    • http://files.rdadivenet.com/uploads/1/3/0/7/130739697/4159791.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/samsung_refrigerator_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8036/files/seattle_jobs_craigslist.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9412/files/catalytic_antibody.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/basic_electrical_engineering_notes_1st_sem_vtu.pdf
    • https://cdn.shopify.com/s/files/1/0457/9200/2204/files/58736580456.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/musuvagexas.pdf
    • https://cdn.shopify.com/s/files/1/0432/3436/1508/files/zesexapobagagadisir.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/banitezexosexojuwewivowir.pdf
    • https://cdn.shopify.com/s/files/1/0433/5871/6055/files/tonikilidabopi.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_off00005eee.bin
de6f01ca7856dc222acd668ae2675b6e8c94413c1d1a5db033ba13fd72d55714
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEE 5252 bytes
font_01_sfnt_off000070c4.bin
9d13de3eac029e1d362bfe52102d5317623615ba00b157d8f76774e7f3a26927
pdf-font-stream PDF embedded font (sfnt) at offset 0x70C4 10812 bytes