Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf4742fb9a4b4a4…

MALICIOUS

PDF

37.3 KB Created: 2020-08-01 04:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ded7c57260c0270850c52c70f8d217dc SHA-1: 8c487e76ec1bf147ca8ec927ce0fb213d111e4f2 SHA-256: eaf4742fb9a4b4a48ac7a8854ea7153136b19f4dcb68555f296078afaaa44877
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF document contains a mass of external links, many of which are SEO-optimized to appear as legitimate book downloads. The primary link, 'https://ttraff.com/pify?keyword=foundations+of+nursing+7th+edition+pdf', is identified as a malicious redirector. This indicates a likely phishing or scam campaign aiming to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this 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://ttraff.com/pify?keyword=foundations+of+nursing+7th+edition+pdf
    • http://files.adashofclass.com/uploads/1/3/1/6/131636677/245d61d958d.pdf
    • http://files.brunoforcine.com/uploads/1/3/1/3/131398452/dedusawoxukilela.pdf
    • http://files.communication-works.ca/uploads/1/3/0/7/130776245/pemeluna-rulokofawaz-gejuka.pdf
    • http://files.wildaboutwampum.com/uploads/1/3/0/8/130813111/galijusugamefo-rovelek-gedori-zivamefejuwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/68763752689.pdf
    • https://cdn.shopify.com/s/files/1/0432/6726/0582/files/62871984522.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/vakebawefunituvufipika.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/88252951383.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jenodilibaxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/72254258851.pdf
    • https://cdn.shopify.com/s/files/1/0433/0618/8955/files/gujariwobimadogafavim.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/todudujanelo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9620/3679/files/507559681.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3435/files/wazeberusobu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0933/files/watatizilunexokowemerabe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83759083977.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/junenukawaposokigiwu.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000532b.bin
930a311406814e6e05a73dbe48832655a762891bf7eb4849a6ce0e3ebbec2654		 pdf-font-stream PDF embedded font (sfnt) at offset 0x532B 5304 bytes
font_01_sfnt_off0000653e.bin
9c598dd5e471775794c61373b889fb8e875bb749cb0b47368e984dd8706df795		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653E 10396 bytes

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