Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ed9fc21827ff7b…

MALICIOUS

PDF

34.2 KB Created: 2020-08-05 05:32:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f79681b85711155e1fdabea876e6eb6a SHA-1: f5e3ef09a21a51ac411b700870707edd19bf4072 SHA-256: 45ed9fc21827ff7bd351e30fb840ae1178285d28c9a261f3985e171b1e966ddf
152 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier with high confidence and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which likely serves to obscure the ultimate malicious destination. Another heuristic indicates a link farm, with many links pointing to Shopify domains, suggesting an attempt to distribute malicious content through seemingly benign platforms. The document body contains garbled text and a reference to the redirector URL, reinforcing the 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.com/pify?keyword=cantate+domino+josu+elberdin+satb+pdf
    • http://files.jennagove.com/uploads/1/3/1/6/131607703/sojetufiwe.pdf
    • http://files.iamdarrin.com/uploads/1/3/0/7/130776180/3302781.pdf
    • http://files.ptgah.org/uploads/1/3/0/8/130813063/namezadodidovi_kudegimuja_koluvajuz_mulidag.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7912/files/92405065860.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/2014_chevrolet_silverado_1500_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/7118/2750/files/67987001101.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/receitas_feitas_com_biomassa_de_banana_verde.pdf
    • https://cdn.shopify.com/s/files/1/0435/9775/8622/files/direito_penal_bitencourt_parte_geral.pdf
    • https://cdn.shopify.com/s/files/1/0435/8003/1137/files/asda_pet_insurance_claim_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/sukutavuperelinojumi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4430/7098/files/javawasawunimafeneperu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/rafobazavanelit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41230052817.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/29793574131.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/pulowomiwujukovo.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_off000046c1.bin
c596a295050d320b6340148555322e96accf1999e2848ee028683d7365e83a2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46C1 5308 bytes
font_01_sfnt_off000058aa.bin
9fa2403256614bcfd007cdc3ffcf82f774bb5b211ac8da011d4d3c552dad42d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58AA 10296 bytes

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