Malicious PDF — malware analysis report

Static analysis result for SHA-256 0120471a8cc34900…

MALICIOUS

PDF

42.0 KB Created: 2020-08-08 16:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3071d08fe3b8a667f8435404907e4dc6 SHA-1: 157b65598306b795b5168ef23dc19744eae10b38 SHA-256: 0120471a8cc34900071da484d65260ffe85b7d1434a93d982213dd9d59e96ac7
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate reports, but the primary link redirects to a known malicious redirector. The ML classifier strongly indicated maliciousness, and the PDF structure suggests an attempt to obscure malicious links. The embedded URLs, particularly the one pointing to 'ttraff.ru', are highly suspicious and likely lead to further malicious content or exploits.

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.ru/pify?keyword=hydraulic+sheet+bending+machine+project+report+pdf
    • http://files.magnoliawoodpool.com/uploads/1/3/0/7/130740375/wagak-teridiguguso-puboxesiguxipes.pdf
    • http://files.larosamexrestaurant.com/uploads/1/3/1/4/131482968/tusugo-xonexapon-vusojibev-bovinilotug.pdf
    • http://livopaso.amylaurenfloraldesign.com/uploads/1/3/0/8/130814297/478892.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/zufabamazo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/dudagojip.pdf
    • https://cdn.shopify.com/s/files/1/0448/4169/7441/files/basso_ostinato.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1687/files/nujizupujudedudutanelisud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9868/6119/files/asciidoctor_font_size.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/kawedulatizatukotapu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/katesafosituvazotelujar.pdf
    • https://cdn.shopify.com/s/files/1/0432/1650/2939/files/optical_isomerism_in_coordination_complexes.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/rizuterinen.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/vaduwipekomafiko.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7125/files/pre_algebra_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/62545703560.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/lodumetisufebidunux.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_off000063e1.bin
8069d1ce2e876bdce48eb28d09faab965861421c4dd36c8bce371d9351ea5217		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E1 5848 bytes
font_01_sfnt_off000077ab.bin
9e8694499f2867f7faf709f9e4b307e6ea4c0631488146d85a901687f79e87a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77AB 10892 bytes

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