Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf89872f247ed8c…

MALICIOUS

PDF

49.9 KB Created: 2020-08-05 14:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30ea593359ffae322eae11aaf740c492 SHA-1: 5fa805df9d4b4adb03d23d292795f372c6e26264 SHA-256: 0cf89872f247ed8c1d52ca03b484937a5b2fd0df3a5b86a9871ed24c67f0f773
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting an attempt to manipulate search engine results or distribute content across many domains. The ML classifier strongly flagged this PDF as malicious, reinforcing the assessment 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=control+valve+actuators+pdf
    • http://files.redcardevents.com/uploads/1/3/1/6/131607232/sukeloguwak_vebiwibolu.pdf
    • http://files.sanctuaries.org/uploads/1/3/1/8/131856443/jebegesogitesol.pdf
    • http://files.ftgnetball.com/uploads/1/3/1/3/131398308/jawivogafo-vonanek-fifas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/jorovavugevonat.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/lizatujebefe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4414/3253/files/acronis_true_image_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0431/4962/3462/files/82284925298.pdf
    • https://cdn.shopify.com/s/files/1/0433/7739/3815/files/zepagipelonarumoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/5438/3782/files/96565766477.pdf
    • https://cdn.shopify.com/s/files/1/0433/9725/1235/files/65082746787.pdf
    • https://cdn.shopify.com/s/files/1/0445/9102/2244/files/candide_fr.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/vuzeperuzux.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_off000087bc.bin
b5090a833a1bf2fcdacacc8b192d00f610b4009341a586cebf3ba84aae641baa
pdf-font-stream PDF embedded font (sfnt) at offset 0x87BC 5116 bytes
font_01_sfnt_off00009932.bin
c4a674e2a46084690dd6fcaaa81ccd9d23b69d837beabc1e6ea5bdd720afdb3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9932 9816 bytes