Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe52dbd9ab77d35…

MALICIOUS

PDF

41.7 KB Created: 2020-09-30 11:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e7aad5c4bbb7d65b144f661580a9843a SHA-1: f614a4bbe78ab28cf95e15448bf2d48fb77df5f7 SHA-256: 8fe52dbd9ab77d35f41cd4e4b5604a7b4d3f01a3ecd96ca32114b844b3215b28
162 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 Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One prominent link redirects to 'gettraff.ru', which is flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL, indicating an attempt to trick users into downloading potentially harmful content by disguising it as a legitimate template. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?keyword=texas+vehicle+bill+of+sale+template+fillable+pdf In PDF document text
    • http://files.bowleylockcompany.com/uploads/1/3/1/4/131452815/nopizusebobobi.pdfIn PDF document text
    • http://tomoz.lifespringwesleyan.org/uploads/1/3/0/8/130874655/lowubu.pdfIn PDF document text
    • http://files.ntspatial.com/uploads/1/3/0/7/130740530/zotanu-kuloxurul.pdfIn PDF document text
    • http://files.simleysoccer.com/uploads/1/3/1/4/131452942/puvamitem-zirazite-kozegan-gamezam.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/1/0433/6841/5400/files/40546946743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1368/5927/files/lexovozawuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0755/7275/files/cinebox_series_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/1788/9960/files/usp_purified_water_specifications.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6825/1543/files/zonewipumasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cd9552c-a40b-4a0c-b789-48db005a38bf/47124072738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79d17cf8-0b7a-4b3f-862a-9ddbc17bba81/kasulagemaninirimodow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/051e9cbe-b7f8-4102-b1f1-023dacad75d0/zazabezimuxafoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1eb8893-cbec-41ad-97bd-9dcc1340a40c/lufad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6145eb49-0c4f-4f5c-b4c8-574ca091cac5/91289526427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/47680111538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3989/1357/files/vekuwinuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3780/2146/files/94680799135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/5296/8609/files/91150255986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mojarugalemidim.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_off000063f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F1 5516 bytes
SHA-256: c0cb93afe5c4fe5f2edf389cbad2da6cfefbde6a1f22d2233fd71a48e45bdb25
font_01_sfnt_off00007695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7695 10212 bytes
SHA-256: b31895d1bbf02d19dca4ec73b588863f8e27808b5039b378d5d33bd74a698c3c

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