Malicious PDF — malware analysis report

Static analysis result for SHA-256 46efd0fc9e912a8d…

MALICIOUS

PDF

44.4 KB Created: 2020-08-25 05:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d494cf00a460eee499d0c59b4653269b SHA-1: aa61879610aa93928b990d287d534b8be14bd351 SHA-256: 46efd0fc9e912a8d9f9eecbadd0c7bb6b09f6546ddcba7d5ed45f6d2b0284809
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is also present in the document body. This indicates a phishing or malware delivery attempt. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, suggesting an attempt to manipulate search engine results or distribute links across multiple benign-looking domains. 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.com/pify?keyword=argos+bedding+size+guide
    • http://files.simplybprints.com/uploads/1/3/1/4/131407214/pujivomawuva-wuros-gesupo-lezusuwojadifog.pdf
    • http://files.aptecintl.com/uploads/1/3/1/3/131381101/3973882.pdf
    • http://files.evangelismseminar.org/uploads/1/3/0/7/130776573/1fe2003a226e2.pdf
    • http://jexut.firstfreedoms.org/uploads/1/3/1/4/131407355/debuvileweduvut.pdf
    • http://files.tizianacambaraufotografie.com/uploads/1/3/2/6/132695478/puluxipajomevoj.pdf
    • http://files.tizianacambaraufotografie.com/uploads/1/3/2/6/132695478/pulu
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/jijivevulazusow.pdf
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/balancing_chemical_reactions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/6059/9701/files/security_guard_risk_assessment_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/5720/8731/files/563636270.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/piriformis_syndrome_exercises_physical_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0437/5583/1445/files/jujulonafineg.pdf
    • https://cdn.shopify.com/s/files/1/0457/8652/9948/files/karvy_nps_ecs_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/5509/4679/files/dead_space_best_weapon.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/vofoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/niwoxipo.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_off0000730e.bin
15f1ad8a6580587f5a69cee00bd50c7520c9f6fdf546f700df83b0eb73ee74bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x730E 4932 bytes
font_01_sfnt_off000083e1.bin
544624eec49f12d9bae26d92aefc4e763bfeea12c4d6626a54cd5177921c0e53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83E1 9648 bytes

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