Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a938f4af60911a…

MALICIOUS

PDF

44.2 KB Created: 2020-07-29 19:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f366beea74ac6eddbd4a41a4ee026a89 SHA-1: 48310877298efebcbd3bba6304f0f3fc6902a1cd SHA-256: b1a938f4af60911ab0cf1e5fe378f951b230aaf5c5fc1ad7eabcde9260b264f4
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The primary redirector URL is `https://ttraff.com/pify?keyword=inborn+metabolic+disorders+pdf`. Another embedded URL, `https://cdn.shopify.com/s/files/1/0434/9755/4084/files/jopasurenesovirisiped.pdf`, is also listed as a potential entry point. The document body is heavily obfuscated and appears to contain metadata rather than user-facing content.

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=inborn+metabolic+disorders+pdf
    • http://files.theblockarcadeballarat.com.au/uploads/1/3/0/7/130739375/doloxafo-zomajutotexem-diboxo.pdf
    • http://files.sarahfieldsmft.com/uploads/1/3/1/3/131398195/5fb56d2ca5.pdf
    • http://files.floralgreenspublishing.com/uploads/1/3/1/8/131871938/2924766.pdf
    • http://files.katherinechwazik.com/uploads/1/3/0/7/130740589/828a3991.pdf
    • http://files.godancedynamics.com/uploads/1/3/0/7/130775729/disupifugobapaj.pdf
    • http://files.godancedynamics.com/uploads/1/3
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/jopasurenesovirisiped.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0617/files/60559173578.pdf
    • https://cdn.shopify.com/s/files/1/0439/6577/6030/files/64702368931.pdf
    • https://cdn.shopify.com/s/files/1/0429/3335/4659/files/napefuzudewuwogutopepufap.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/pivitikopuxabelunopar.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/zexuvamurogutijirofamo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4982/9023/files/70627853487.pdf
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/rurobabama.pdf
    • https://cdn.shopify.com/s/files/1/0435/6662/9032/files/wajuvabon.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/45823059830.pdf
    • https://cdn.shopify.com/s/files/1/0434/0976/8604/files/59540291295.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_off00006f67.bin
1f269c15298da370dd327cf9f8395e649d4a216010639e4331f293b8ed70624b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F67 5168 bytes
font_01_sfnt_off000080c7.bin
a3e97951a671a5a3ee016628341b1c75ddb96261a7a7802aa44a541bb62ec002		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C7 10200 bytes

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