Malicious PDF — malware analysis report

Static analysis result for SHA-256 6104156f27157645…

MALICIOUS

PDF

49.5 KB Created: 2020-08-04 15:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae3c9c89a6ef2de7040208ada27bc633 SHA-1: 432d9039a645ef987407c2cc56fff35ab6cd79ab SHA-256: 6104156f27157645f84da158ca43a4c447b960189becbac58e9053ec242efd05
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or SEO manipulation tactic. One prominent URL, https://ttraff.ru/pify?keyword=banking+ombudsman+scheme+2020+pdf+rbi, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, indicating a likely attempt to drive traffic to malicious infrastructure. No scripts were extracted, but the PDF structure and link farm heuristic strongly suggest malicious intent.

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=banking+ombudsman+scheme+2020+pdf+rbi
    • http://files.stoneranchpta.org/uploads/1/3/1/3/131398085/kezulede_nabilagebo_xegapukib_natilaru.pdf
    • http://files.delightedbyyare.com/uploads/1/3/1/6/131607010/pezovu-gewebaligixaj-mikonudilidida.pdf
    • http://files.sscreations.online/uploads/1/3/0/9/130969310/benow-zonobukezogigon-kikojojujilogu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/9701/2890/files/wukidabaxeju.pdf
    • https://cdn.shopify.com/s/files/1/0429/8076/9951/files/vuvav.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1930/files/wuzofolosavusaxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/commutative_associative_and_distributive_properties.pdf
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/jedezufita.pdf
    • https://cdn.shopify.com/s/files/1/0437/9354/7424/files/property_casualty_exam_secrets_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/6961/8841/files/27724129552.pdf
    • https://cdn.shopify.com/s/files/1/0428/7964/7903/files/79455378925.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/pavisotovalawiga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mituvazejuremoposanizama.pdf
    • https://cdn.shopify.com/s/files/1/0436/0932/5730/files/3889384712.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51191810805.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000739c.bin
8fda8e5d13faf9802fb63347a48b026bd4714f03a7526b35aa73d3cf8f888bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x739C 5868 bytes
font_01_sfnt_off00008755.bin
c366a516f77314e9040a956dfd3c76724b2c403d647f17b11a53a1cbdeba5c6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8755 10304 bytes
font_02_sfnt_off0000aa76.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA76 4324 bytes

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