Malicious PDF — malware analysis report

Static analysis result for SHA-256 95427a8794dc2632…

MALICIOUS

PDF

34.9 KB Created: 2020-08-21 03:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8612f18caf2244b24b63b80a1517e33 SHA-1: 573a3c62e5e7767d31ee270a147ac15aec13413a SHA-256: 95427a8794dc26324b44e431ae75d37e61a63ac0c4ca0dee9d5910e5182d562e
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain, ttraff.com. The document body, though heavily obfuscated, contains the string 'annadurai movie songs kuttyweb' and the malicious URL, suggesting a lure for SEO poisoning or click fraud. The ML classifier strongly indicated maliciousness.

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=annadurai+movie+songs++kuttyweb
    • http://files.thebattleformaumauisland.com/uploads/1/3/0/7/130775734/c2f06d7732.pdf
    • http://pimeradul.myncpl.us/uploads/1/3/0/7/130776167/zubelur.pdf
    • http://zewewej.tribalnationsmaps.com/uploads/1/3/1/3/131384495/dutegakelafezu_tedipu.pdf
    • http://fogopege.amityfarms.com/uploads/1/3/2/7/132740541/40fb928.pdf
    • http://files.mtntrade.net/uploads/1/3/0/7/130740490/rugapazemew.pdf
    • https://cdn.shopify.com/s/files/1/0437/3181/2504/files/62838084785.pdf
    • https://cdn.shopify.com/s/files/1/0435/5227/6632/files/ravikezolaxixokusetemel.pdf
    • https://cdn.shopify.com/s/files/1/0437/9449/7698/files/64721226025.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/29329793001.pdf
    • https://cdn.shopify.com/s/files/1/0439/3123/8555/files/62520350678.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/al_mughni_ibn_qudamah.pdf
    • https://cdn.shopify.com/s/files/1/0450/1897/2318/files/simple_index_laws_worksheet_tes.pdf
    • https://cdn.shopify.com/s/files/1/0440/8921/3093/files/nomenclature_worksheet_3_ionic_compounds_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0476/files/77303735747.pdf
    • https://cdn.shopify.com/s/files/1/0436/6457/2569/files/72216747146.pdf
    • https://cdn.shopify.com/s/files/1/0438/3673/5645/files/rerajifukokulolof.pdf
    • https://cdn.shopify.com/s/files/1/0438/1802/5122/files/5682821324.pdf
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/55183503127.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_off00004b84.bin
5181a4c576393f7e46519f137a71caa973dfecc579eb43bd1736d23bef1186b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B84 5560 bytes
font_01_sfnt_off00005e71.bin
7e6f8b51951397488ed416b54a7eb87a6948dd911bc58addee9a42d4f5af7ee2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E71 9452 bytes

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