Malicious PDF — malware analysis report

Static analysis result for SHA-256 346fae1e131b8789…

MALICIOUS

PDF

47.7 KB Created: 2020-08-14 15:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c285459924fc4a3fe0fed0bd38aa934 SHA-1: a456ab5359c23a4b99547079e07f7f993e2fc065 SHA-256: 346fae1e131b8789ab5b7589d4249b7dfaa70a704de8050b72c3594c1007d07e
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. Additionally, it contains a large number of embedded links, identified as a PDF link farm, with many pointing to Shopify domains. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users through these links, likely to a phishing or malware distribution site.

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=chocolate+sheet+cake+with+cooked+frosting
    • http://files.paultrothqbu.com/uploads/1/3/2/6/132696128/masumibil_fojabiwi_kozatemora_dapose.pdf
    • http://files.veblaw.com/uploads/1/3/2/8/132814250/kotegopadixoja.pdf
    • http://files.mikevincentphotography.net/uploads/1/3/0/8/130813582/2879111.pdf
    • http://xopenoxe.victoriawejko.com/uploads/1/3/1/1/131164239/relaguteva.pdf
    • https://cdn.shopify.com/s/files/1/0432/7371/5880/files/xetawobokejopubiradugibu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/burma_tamil_movie_in_utorrent.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/69736423307.pdf
    • https://cdn.shopify.com/s/files/1/0447/4689/9607/files/lipid_oxidation_challenges_in_food_systems.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/sojozu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/famufanilozivesosarefanax.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/15136431752.pdf
    • https://cdn.shopify.com/s/files/1/0429/0756/6239/files/ieee_referencing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9017/files/4975751633.pdf
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/89640447142.pdf
    • https://cdn.shopify.com/s/files/1/0434/0049/5260/files/22515605418.pdf
    • https://cdn.shopify.com/s/files/1/0432/6624/4764/files/bwf_badminton_rules_and_regulations.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/vimikugifaliru.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/sepefozebija.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065f4.bin
9370c0fa58ae73e669d7b4a19611025b794b2034ef575aa3ae230d6aa7e5f02d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F4 5344 bytes
font_01_sfnt_off00007827.bin
e5e4ffeca156f9fa90c84c53f7ec8fb64ceea4d86368592f2cae6eed91164e1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7827 10412 bytes
font_02_sfnt_off00009c00.bin
975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C00 16312 bytes

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