Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba075adfd9d74d7…

MALICIOUS

PDF

47.5 KB Created: 2020-08-06 15:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a56ef05d55ee1f20ff8587d4d8632e0 SHA-1: caef5d8c35517fb689e2abc103ba450348049e09 SHA-256: 1ba075adfd9d74d703db6a5269a4e18abcc8b193d2741d90af087c500ffd4231
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring users to malicious infrastructure via deceptive links within the PDF.

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=marathi+english+barakhadi+chart+pdf
    • http://files.digital-human.org/uploads/1/3/0/8/130813639/917a870.pdf
    • http://files.larsentallaridaarchitects.com/uploads/1/3/0/8/130814397/lalikel.pdf
    • http://files.randrpetservices.co.uk/uploads/1/3/1/4/131482944/zomutibo.pdf
    • http://files.roygrayphotography.co.uk/uploads/1/3/0/8/130813111/jadukemose.pdf
    • http://files.holderdesign.net/uploads/1/3/1/4/131407029/vifanuvubi-mikaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/wipoxilidiwadufapoxemi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7238/0314/files/39102273360.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/5967739125.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/armorseal_1000_hs.pdf
    • https://cdn.shopify.com/s/files/1/0432/7600/9622/files/86598134544.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/78288006029.pdf
    • https://cdn.shopify.com/s/files/1/0448/3517/6608/files/business_communication_essentials_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/datojivike.pdf
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/nepararibajaxufulil.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061ac.bin
2cfcea8e9597d15ecb7f4a79230c83960d82089b237aae20cb77c96c81cf1eb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61AC 5628 bytes
font_01_sfnt_off000074ca.bin
b5c6b6e0c9ada0bf1c6b02372d38a6194b0fc304f51b15768a03b7bd417def48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74CA 3048 bytes
font_02_sfnt_off000080db.bin
064e186c53d8884b8c9783f2e063e9421a39eb6757b1be354a0f47b3ab0574ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80DB 10980 bytes
font_03_sfnt_off0000a4d3.bin
5c01fc81628a4ddc974d8260f2ee9c2ac35cb451407338a1cc253165060a4abd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4D3 2908 bytes

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