Malicious PDF — malware analysis report

Static analysis result for SHA-256 99693d309230c382…

MALICIOUS

PDF

42.7 KB Created: 2020-08-20 08:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09fa7dd9a3739d748c27362499431321 SHA-1: a3e25a749300f04f001ed8350e3dc7077c859efb SHA-256: 99693d309230c38290857c3b71cd6f3a18f930e61a14da6d74c64c88d4771e6a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to a URL that appears to be a lure for 'bible quiz competition questions and answers'. This link redirects to a malicious domain. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious.

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=bible+quiz+competition+questions+and+answers
    • http://files.artistnik.ca/uploads/1/3/1/4/131455832/piwomosujaguvapirefu.pdf
    • http://files.gonskylaw.com/uploads/1/3/0/7/130739443/1170790.pdf
    • http://files.enlightenedheartoc.com/uploads/1/3/0/9/130969942/sazejad.pdf
    • http://files.eygbball.com/uploads/1/3/0/9/130969800/6470643.pdf
    • http://files.dentalexplorations.org/uploads/1/3/0/7/130740563/6b17a84f2d96.pdf
    • https://cdn.shopify.com/s/files/1/0430/6999/7207/files/14788052271.pdf
    • https://cdn.shopify.com/s/files/1/0428/9393/4748/files/close_to_you_carpenters_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/7003/6904/files/16295838977.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/action_potential_of_heart.pdf
    • https://cdn.shopify.com/s/files/1/0437/6949/5710/files/28455371928.pdf
    • https://cdn.shopify.com/s/files/1/0428/3547/6636/files/denusi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wabodenerevugibew.pdf
    • https://cdn.shopify.com/s/files/1/0428/5045/1623/files/anatomie_systme_respiratoire.pdf
    • https://cdn.shopify.com/s/files/1/0432/3259/2040/files/21455867893.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3970/files/83307382035.pdf
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/52126740800.pdf
    • https://cdn.shopify.com/s/files/1/0431/3514/0007/files/coleman_5000_watt_generator.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000676d.bin
02b45def8e7890262d59b97dd2ff8884b294b1bb49eb2ac9c0524229f37f8fd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x676D 5676 bytes
font_01_sfnt_off00007aae.bin
9c5606c73fb81674e5bf89ba7155dec8f26a3d6c824550eb748bd7d1451d03cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAE 10328 bytes