Malicious PDF — malware analysis report

Static analysis result for SHA-256 675186284488f9ff…

MALICIOUS

PDF

44.2 KB Created: 2020-07-31 08:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 570a781440d0aecbf65029d90358a5ad SHA-1: 41b418d90503bb3dacc82553e3acced2ee0f26ef SHA-256: 675186284488f9ff88c622dce4e45143776ee1759a7812f34afb2c4d59d09633
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, masquerading as a free download. The ML classifier strongly indicates maliciousness, and the PDF structure includes a link farm, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. No scripts were extracted, but the presence of a malicious redirector is a high-confidence indicator of malicious intent.

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.cc/pify?keyword=smoothie+recipe+book+pdf+download
    • http://files.vibrant-energies.com/uploads/1/3/0/8/130873907/nomadu.pdf
    • http://files.chantalbalestri.com/uploads/1/3/1/8/131871621/4022916.pdf
    • http://files.kwikcashsolution.com/uploads/1/3/0/9/130968947/fugifuzuf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/8897/5774/files/wibufilozifowela.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/ritobixuruxobelufef.pdf
    • https://cdn.shopify.com/s/files/1/0431/7642/7686/files/12068033190.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nomevorijodasulalo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8476/7641/files/26548229858.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4745/files/ramulisoxep.pdf
    • https://cdn.shopify.com/s/files/1/0438/3227/9190/files/satufewibuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/17738747527.pdf
    • https://cdn.shopify.com/s/files/1/0434/0727/8247/files/11756418146.pdf
    • https://cdn.shopify.com/s/files/1/0434/7419/0498/files/4953173964.pdf
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/15608881750.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_off00006ead.bin
4d6378d828f4cb2446b98cb42ffff1e3b46ca46b14073378a7f81265b65d7841
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAD 5404 bytes
font_01_sfnt_off000080ea.bin
e557b7393a50692df462690fe884b4d5c68885eb302ba54b97a391d9a1859f1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x80EA 10272 bytes