Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af6e2ba1d2df1d1…

MALICIOUS

PDF

35.9 KB Created: 2020-08-13 22:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4018d60340c99befd55a1cb5933daab1 SHA-1: 186d85538dfd53a410570038df519bab6b23914b SHA-256: 5af6e2ba1d2df1d1c019822f9ef4e937ce10f3d7fb4462b927113bff09d23326
174 Risk Score

Malware Insights

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

The PDF document is identified as a malicious redirector and a link farm, containing numerous external links. The primary malicious link, https://ttraff.ru/pify?keyword=compellent+sc4020+admin+guide, is flagged as malicious infrastructure. The document's structure, with minimal text and a single image, suggests a screenshot lure designed to trick users into clicking the embedded malicious link, likely leading to a phishing page or malware download.

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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 35 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=compellent+sc4020+admin+guide
    • http://files.casa-collective.com/uploads/1/3/0/9/130969768/7834245.pdf
    • http://files.fdmolinares.com/uploads/1/3/0/7/130739982/6257038.pdf
    • http://files.getdropmint.com/uploads/1/3/1/0/131070993/laropot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/3789/1477/files/38196933883.pdf
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/butomejimexipuda.pdf
    • https://cdn.shopify.com/s/files/1/0435/5935/4517/files/neopets_secret_laboratory.pdf
    • https://cdn.shopify.com/s/files/1/0427/4687/1974/files/89598565750.pdf
    • https://cdn.shopify.com/s/files/1/0443/1986/7036/files/daffynition_decoder_angles_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/pobapizuwuseximupudedosa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0020/9319/files/52767726775.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/59042805572.pdf
    • https://cdn.shopify.com/s/files/1/0436/0726/1341/files/bobcat_s185_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/abrsm_piano_grade_6.pdf
    • https://cdn.shopify.com/s/files/1/0432/6742/4412/files/63256674144.pdf
    • https://cdn.shopify.com/s/files/1/0430/8438/2357/files/gesibanowajuva.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_off000044f9.bin
901ddc60c751a90e1698cf55dc10c1a58d3d0cd8f31e1a15b098bf7487c2b096		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44F9 5564 bytes
font_01_sfnt_off000057db.bin
ce518374bdb16ccb50bc37b2fbeff4e83f7a1ae0f366bb450c37ae48282502a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57DB 8372 bytes
font_02_sfnt_off00007460.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7460 4324 bytes

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