Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb37773d9e9e19a4…

MALICIOUS

PDF

33.6 KB Created: 2020-08-10 11:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd2180d8400f365e86f289b031c0e424 SHA-1: 3cbd72fb5b5f2db2c3def88324701aa211e217e4 SHA-256: eb37773d9e9e19a46696b4fa966ce0f087f92ecc900729d8bbd56256737942c9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a deceptive lure, masquerading as devotional songs, to trick users into clicking a malicious link. The primary malicious URL, https://ttraff.com/pify?keyword=malayalam+devotional+songs+pdf, is identified as a redirector to known malicious infrastructure. The document also hosts a large number of benign-looking PDF links, likely for SEO manipulation or to obscure the malicious intent. The ML classifier strongly supports the malicious verdict.

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=malayalam+devotional+songs+pdf
    • http://files.ncherbsociety.org/uploads/1/3/2/3/132302759/pufabofek.pdf
    • http://files.zebradental.co.uk/uploads/1/3/0/8/130874213/wiwazomamelizukidan.pdf
    • http://files.tsirkusetalu.com/uploads/1/3/0/9/130969045/sewudus-raxamotube-kuvonarovurusi-jarukutox.pdf
    • https://cdn.shopify.com/s/files/1/0433/2971/6374/files/33399737977.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/62347481386.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/96188182377.pdf
    • https://cdn.shopify.com/s/files/1/0435/4582/1333/files/zodozezijemugo.pdf
    • https://cdn.shopify.com/s/files/1/0435/0109/3030/files/quicken_home_and_business.pdf
    • https://cdn.shopify.com/s/files/1/0438/1877/8781/files/8410082005.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/tapop.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/scp_containment_breach_d-_9341.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/baloxurebivive.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/minecraft_guns_resource_pack.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/autocad_drawing_converter_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/4937/6149/files/understanding_movies_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0983/files/fefalirolorib.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_off00004718.bin
7acaac995ad127deb76e2e67e0ba386d31099cc154a33d116db13e576837214f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4718 5432 bytes
font_01_sfnt_off000059a7.bin
24dcd1dc8c10ca4a648d979d6165aa7760edf94f16406f4d7a261ad616c1e7f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A7 9396 bytes

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