Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ab3fe3f7a5b9ab…

MALICIOUS

PDF

44.1 KB Created: 2020-08-10 01:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee7e18b9d04924b84c92144b50d01fee SHA-1: 92b5995de0e3ecfca70ddabb9acd98d31cb09a8d SHA-256: 36ab3fe3f7a5b9abacfe9a1317e1840bf300b85a89ef45dfa9ee1fd314aac389
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=tillich+systematic+theology+pdf', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to academic topics and the malicious URL, suggesting a lure to trick users into clicking the link.

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=tillich+systematic+theology+pdf
    • http://files.zenithfitnesstraining.com/uploads/1/3/2/7/132741029/5546136.pdf
    • http://files.heritageschoolofdiscovery.com/uploads/1/3/0/7/130775145/9742970.pdf
    • http://files.rooambieretreat.com/uploads/1/3/1/3/131379991/1bff14ccc1.pdf
    • http://files.sass-and-crafts.com/uploads/1/3/0/8/130815213/puwakujojavulazamad.pdf
    • http://files.downonthefreedomfarm.com/uploads/1/3/1/6/131607075/5396505.pdf
    • https://cdn.shopify.com/s/files/1/0432/9340/9438/files/wigozapaxujenidaxuwadoma.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32773531818.pdf
    • https://cdn.shopify.com/s/files/1/0434/7419/0498/files/ranuweziwotavelulaza.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2719/files/mario_combat_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7654/files/clifford_the_big_red_dog_story.pdf
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/bordereau_de_situation_fiscale_modle_p_237.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/67855644415.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/cake_recipes_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/vikegexawegusovigitopad.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/12644200289.pdf
    • https://cdn.shopify.com/s/files/1/0455/7661/8149/files/analytical_geometry_grade_10_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/mappa_metro_amsterdam.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9673/files/51359693216.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_off00006db1.bin
76f7655f42c6b9532bdd0f7f85ff66a847b25d6e3737bad4b1bf38c8e6744a8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB1 5524 bytes
font_01_sfnt_off00008064.bin
811ef436ad761d6a5369f5a310f30a3c64c85bb98c43e32a89d7803c494f3e6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8064 10340 bytes

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