Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0172037c86b829…

MALICIOUS

PDF

36.0 KB Created: 2020-08-19 04:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3da81829d9b6d2b8c6cbb8a1d5cbef2 SHA-1: f588393f2508a31078a6b5b08e467329c5399bf6 SHA-256: 0e0172037c86b8296fb9f32486162678bc66ea1e4b618d2e3eff9f2bf92ea8cc
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=ranger+blood+fluid+warmer+service+manual'. This suggests the document is designed to lure users to a potentially harmful website. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate 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.com/pify?keyword=ranger+blood+fluid+warmer+service+manual
    • http://files.sfsailing.org/uploads/1/3/2/6/132695915/vurobazavarew_redipumuwope_todamorifujonil_davanonawufig.pdf
    • http://susavubal.henrysofbrailsford.co.uk/uploads/1/3/1/4/131438556/8808927.pdf
    • http://files.km4kate.com/uploads/1/3/2/3/132302963/xubofivajaj-wemiwosuxanaru-zulutotare-nizuzi.pdf
    • http://files.westandmiddlechinnock.co.uk/uploads/1/3/0/7/130739371/dfddb70119a1f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3492/6495/files/93412976311.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/mapebotajuzopixofavu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65107231385.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/joduliwupudokef.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0334/files/rotidenasenijagazawetugi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/70522804756.pdf
    • https://cdn.shopify.com/s/files/1/0430/9352/4637/files/66245891013.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/kexarux.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7988/files/24280568212.pdf
    • https://cdn.shopify.com/s/files/1/0435/5345/6289/files/68603954013.pdf
    • https://cdn.shopify.com/s/files/1/0441/3430/1848/files/cable_lugs_and_glands.pdf
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/97935707057.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d2e.bin
c3ca9686725a53338690ef84bc0937d69f2520cbd4e62e304c7597ebe426e2d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D2E 5640 bytes
font_01_sfnt_off0000605f.bin
73206a81ac7c175417353e5e9056aff19f34ea8f36354213eea444bd5e5ba644		 pdf-font-stream PDF embedded font (sfnt) at offset 0x605F 10152 bytes

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