Malicious PDF — malware analysis report

Static analysis result for SHA-256 374743c512f3ffa1…

MALICIOUS

PDF

44.6 KB Created: 2020-08-14 09:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7e6f43f2ebc638302bb1a8e732a91cf SHA-1: 44cc2dbd89d8b8362f1aa93e02ea9447753aa881 SHA-256: 374743c512f3ffa124e9556751e2335d364ebf0057a5c8438217487374cfce1c
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning model and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body itself contains the primary malicious URL and a large number of other URLs, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The primary malicious URL is https://ttraff.ru/pify?keyword=aggregator+transformation+questions.

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=aggregator+transformation+questions
    • http://sadubo.johnmindeman.com/uploads/1/3/1/4/131482952/e0ed99951.pdf
    • http://files.thesilkfamilyproject.com/uploads/1/3/1/4/131437740/livig.pdf
    • http://novuza.peggycoots.com/uploads/1/3/1/6/131606490/3644576.pdf
    • http://terevukab.perfectskinllc.com/uploads/1/3/0/9/130969559/feronafaperazi.pdf
    • http://files.littlefieldgallery.com/uploads/1/3/0/8/130813906/efe1fe75fec.pdf
    • https://cdn.shopify.com/s/files/1/0436/6221/3270/files/cellula_eucariote_e_procariote.pdf
    • https://cdn.shopify.com/s/files/1/0432/7420/7387/files/ram_amritvani_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0428/2423/7212/files/statistical_and_machine_learning_data_mining_third_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/1090/6518/files/bilutozixevizuzixofuxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/13284783680.pdf
    • https://cdn.shopify.com/s/files/1/0429/6700/7386/files/d_d_5e_character_sheet_fillable_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/1510003405.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0608/files/statistics_freedman_4th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/9284/3422/files/isolation_and_identification_of_actinomycetes_from_soil.pdf
    • https://cdn.shopify.com/s/files/1/0434/4843/4840/files/mijelumujalubogofelo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/jomonoxuwejukujogum.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_off00007005.bin
59b55c4ea67015eb0a9e99dd489dbab26773f79162640c642650807dbdbe49c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7005 5168 bytes
font_01_sfnt_off00008185.bin
af7b71951593ba8fa91bc356e0f4ed6f95ba13c44a50fb7f5ed5ecbe3ef6429b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8185 10484 bytes

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