Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb58f00967289d7b…

MALICIOUS

PDF

48.5 KB Created: 2020-08-06 18:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19ae80d527786e84555b4d5cf7ef5ab1 SHA-1: b8a8475693a115f0b5bfa5ab8db66bec4278dcf3 SHA-256: eb58f00967289d7b4f5e9812bb610dd14d46a65dfda0d5d2cd6597b4f87ba5d0
152 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered this heuristic. The sample also exhibits characteristics of a link farm, with many embedded URLs pointing to external resources, some of which are hosted on Shopify. The primary malicious intent appears to be redirecting users to potentially harmful sites.

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=metabolic+diet+meal+plan+pdf
    • http://files.heikesfamilyfarm.com/uploads/1/3/0/7/130738960/7111973.pdf
    • http://files.quielclass.com/uploads/1/3/0/8/130874316/kaxepokakupujofuji.pdf
    • http://tazimojo.vasanthivanniasingham.com/uploads/1/3/0/8/130814297/7038913.pdf
    • http://files.yanka-online.com/uploads/1/3/2/8/132814791/vilos-wonuzisenejawe.pdf
    • http://files.keepcalmandreadon.org/uploads/1/3/1/4/131409794/b1a39f3a4887269.pdf
    • https://cdn.shopify.com/s/files/1/0437/8315/9957/files/generate_random_id_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71895612735.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/fegojokux.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/mijikezum.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/waveso.pdf
    • https://cdn.shopify.com/s/files/1/0453/9963/8184/files/libro_after_2_gratis_completo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/bivaniforowakomutarubes.pdf
    • https://cdn.shopify.com/s/files/1/0434/1848/4888/files/52295016785.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/81167844317.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/noxelozanofar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/zukigotapitaxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0787/7017/files/simon_ielts_essay_topic.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_off00006a1e.bin
54e70b02c6deac5f45f99651d6f0b7895aa758841b28a2ed3305b01d95945671		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1E 5172 bytes
font_01_sfnt_off00007bb1.bin
01be81340b112a75c1e2d3976d50d5be54069631d1c8c1c03c74d7415db4ac9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB1 10676 bytes
font_02_sfnt_off0000a010.bin
2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA010 16060 bytes

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