Malicious PDF — malware analysis report

Static analysis result for SHA-256 386e4a6dda1b1f32…

MALICIOUS

PDF

45.9 KB Created: 2020-10-12 10:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 33118458d06a7cf1d8f7f861e96c062a SHA-1: 7e7aa306c57b99495622a20e47c55d7012dc5b46 SHA-256: 386e4a6dda1b1f32c9eb4ad58f367660e030d1ad7f1149621d6e2decf6077c47
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, disguised as product instructions. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://gettraff.ru/pify?keyword=mr.+coffee+iced+tea+maker+instructions as malicious. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are likely part of a link farm designed to manipulate search engine results, with the first URL being https://cdn.shopify.com/s/files/1/0437/1267/5995/files/madukubabajalufelejez.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://gettraff.ru/pify?keyword=mr.+coffee+iced+tea+maker+instructions In PDF document text
    • http://files.rbflooringsolutions.com/uploads/1/3/1/8/131859613/disit-xexogajivuruma-juzuk.pdfIn PDF document text
    • http://files.lovettarts.com/uploads/1/3/1/4/131452858/tugibijog-xurumuwi-zexemuxov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1267/5995/files/madukubabajalufelejez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3485/5582/files/amulet_of_natural_armor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5600/8868/files/vegixixalafutekosinat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5943/6968/files/28074210305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9710/6848/files/fepavavebujumoditabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e257c73d-c770-4f5f-a4fc-7b1527d62607/jesibemalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03077b37-0569-4fe1-adfc-2bd42a16ec2c/22061463412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de790a92-da67-4d81-b353-ebc7b2f8172b/govamosonigagow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba16dad8-768e-4ac7-b4d4-b33882f84c26/gexetabedudusobexewuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d1bc349-0b2d-4689-808d-d51e2307d196/rapisamubuvavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/723704ce-86b4-430b-b248-07b5dd2243a3/38219062263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b6ed07b-cbca-4f59-bf96-a693162a6695/bebudixape.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F4 5236 bytes
SHA-256: f870e9b5fa53bdca4a4a0d1616a76e02908585a2e5cfc49df29b25d6237a583c
font_01_sfnt_off000088b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B4 10020 bytes
SHA-256: 6ea2ab79b9f8a5e76cb552df07647ce6b9e3c061f00e78615c6b40e4f4d4ef6e

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