Malicious PDF — malware analysis report

Static analysis result for SHA-256 185bf92212ffb3de…

MALICIOUS

PDF

53.2 KB Created: 2020-08-06 14:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fe4e50dcd3b2839f6b2344f8f31c1fd SHA-1: 2541caa7eea7cad2a364adf908dc23a1b2d6b673 SHA-256: 185bf92212ffb3dedbc7dd9ae9ab7d0834f20191b869eaf55ae994d12b501a91
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to "categories of crime" and includes the malicious URL. This suggests a phishing or scam attempt to redirect users to malicious content.

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=categories+of+crime+pdf
    • http://files.venissimo.com/uploads/1/3/0/7/130776110/galejobuwuti.pdf
    • http://files.bankslaneinfants.org.uk/uploads/1/3/1/4/131406086/ginevarukujikifuzuj.pdf
    • http://files.pariscoc.org/uploads/1/3/1/6/131636956/koguxamekasabi-kukopad-lidelujigixo.pdf
    • http://files.figtreechristian.org/uploads/1/3/1/4/131453061/dugorepa.pdf
    • http://files.portiaresnick.com/uploads/1/3/1/4/131453990/gezemilevupa-texuxidireme-tomarudok-zesedo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7612/4821/files/56892455664.pdf
    • https://cdn.shopify.com/s/files/1/0429/9603/9839/files/mabef.pdf
    • https://cdn.shopify.com/s/files/1/0429/4233/3084/files/1174914700.pdf
    • https://cdn.shopify.com/s/files/1/0434/4312/6438/files/assignation_temporaire.pdf
    • https://cdn.shopify.com/s/files/1/0435/5755/2277/files/wexobe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5032/8486/files/novezixapitekewi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/motor_vehicle_representative_exam.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/2391765764.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0619/files/soya_beans_farming_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0432/1089/9624/files/52944356431.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80463449019.pdf
    • https://cdn.shopify.com/s/files/1/0432/2295/8248/files/biomass_fuelled_power_plant_seminar_report.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_off00009254.bin
823c02fb2cfa3986244eb0cf4e55d35d83713ae072c1498f5aa996c4995585a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9254 5348 bytes
font_01_sfnt_off0000a46f.bin
1b516e75c443368594d5dfbf2eaf25ab4644fca8127cdc8ac9f46be9dbc606df
pdf-font-stream PDF embedded font (sfnt) at offset 0xA46F 10304 bytes