Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ccede45a73192b2…

MALICIOUS

PDF

48.1 KB Created: 2020-07-29 10:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 156e73589f702bb3c4f56dae4e6b00c1 SHA-1: a15f465c3eebe1a9003d85d302598176007e629e SHA-256: 9ccede45a73192b2feb04d8bae55d9be390f97f828f7e13266149c7b80c92c10
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a high number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.com. This suggests the primary purpose is to redirect users to malicious or spam content. The ML classifier also strongly indicated maliciousness. While the document body is heavily obfuscated, the presence of numerous links, including one to a known malicious redirector, is sufficient evidence.

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=administra%25C3%25A7%25C3%25A3o+produ%25C3%25A7%25C3%25A3o+slack+pdf
    • http://files.morganofriverton.com/uploads/1/3/1/4/131437005/gifuruvisilivoripo.pdf
    • http://files.profiteffect.com/uploads/1/3/2/7/132740377/zesasufajewav.pdf
    • http://files.errorsweliveby.com/uploads/1/3/1/3/131380717/vufobose.pdf
    • http://files.profi
    • https://cdn.shopify.com/s/files/1/0436/1319/2349/files/73455448833.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/pugiwosi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/16518233499.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/gupazuvaxuvujalelujopis.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4154/files/molorev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41448402009.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/xajotujikuxuwulif.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/6920067011.pdf
    • https://cdn.shopify.com/s/files/1/0434/3300/1126/files/firewirogadorivunuwew.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/30643766526.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/suzosanadore.pdf
    • https://cdn.shopify.com/s/files/1/0433/2807/7992/files/korisuvivupesu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3732/6488/files/fetebojukavoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2289/files/fezesajugag.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/mopuziwebe.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_off0000790f.bin
a1066f8d9b941143206bd3c5187e72d12fcd9bb1773c24beb9c6205f93250c8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790F 5620 bytes
font_01_sfnt_off00008b26.bin
06d95448856bb9f65efc14dd83579e7b10c8986c6d8dff82dac62c5645ab0272		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B26 12672 bytes

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