Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c557d01d9d0f94e…

MALICIOUS

PDF

49.8 KB Created: 2020-08-16 23:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a43c4c1026bc5de5c85d92f5238b405 SHA-1: 7bb3baa1a6381340bd900ba0f93a08f7892eed81 SHA-256: 7c557d01d9d0f94e2cd01f540940b62e07fa9776828e46cfadf7ae9642fd5e69
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to 'ttraff.ru', which is flagged as malicious. The document body and embedded links suggest a lure to download a movie, likely to lead the user to a malicious site. The PDF also contains a large number of embedded links to Shopify domains, many of which are benign, but the primary malicious link is clear.

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=commando+2+full+movie++720p+filmyzilla
    • http://guzob.dawes.work/uploads/1/3/2/8/132816066/pawabul-tuwifaposux-kuwugel-kufetigakumob.pdf
    • http://files.iamsonofgod.net/uploads/1/3/1/4/131452997/nirava-rasabudotabezu-jojogesamubodum.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8369/files/find_my_facebook_id.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuxopikuxoxixu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4362/5880/files/smart_antenna_seminar_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/4419/9829/files/gewitelirawunu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/presto_pressure_canner_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/1915/6130/files/lanibuzumibasum.pdf
    • https://cdn.shopify.com/s/files/1/0439/6033/6542/files/69818020583.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/ky_warming_liquid.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/adjective_clause_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0432/4353/6541/files/twitter_consumer_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/jaundice_diet_chart.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/72214865676.pdf
    • https://cdn.shopify.com/s/files/1/0433/6713/7438/files/62350985805.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_off00006fca.bin
b5728654f5bb6d6339d177d8ce233cf1f1c282905cefaec9eade69dc35a01053		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCA 5384 bytes
font_01_sfnt_off00008224.bin
074659573ed213b9ea94729d43bb5d9bd8dc649e5d27684df4832bef729dee71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8224 10076 bytes
font_02_sfnt_off0000a4e8.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4E8 16164 bytes

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