Malicious PDF — malware analysis report

Static analysis result for SHA-256 07cd7b4d49be3a5f…

MALICIOUS

PDF

43.3 KB Created: 2020-07-31 22:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82b38024d457ec4256da3874246b2e91 SHA-1: cf6dcb96b3e38e2e3527d74c1e0f22ad7ab47c9e SHA-256: 07cd7b4d49be3a5f1e916827e9b249d82268ed602b5cc05b00cde467337023e8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a game-related guide, likely intended to trick users into clicking the malicious link. The ML classifier strongly indicated maliciousness, supporting the conclusion that this is a phishing or scam attempt.

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=osrs+family+crest+quick+guide
    • http://files.porterfinancescam.greatwebsitebuilder.com/uploads/1/3/1/1/131164520/4956212.pdf
    • http://files.justtwoeyes.candletothesun.com/uploads/1/3/1/8/131856757/8590407.pdf
    • http://files.craftedcasesnc.com/uploads/1/3/0/8/130813696/4246401.pdf
    • http://files.viproulettesystem.com/uploads/1/3/1/4/131452858/reteli_wusubumutope_legemoj_muzuvudawogexa.pdf
    • http://files.habiology.org/uploads/1/3/0/8/130874102/ginoweku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1378/2178/files/silakitek.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/vejitivasi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2299/9964/files/1819803760.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0021/files/duser.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7645/files/22534021623.pdf
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/50951419367.pdf
    • https://cdn.shopify.com/s/files/1/0437/3849/7185/files/11955996654.pdf
    • https://cdn.shopify.com/s/files/1/0434/0930/9848/files/fitabax.pdf
    • https://cdn.shopify.com/s/files/1/0432/9078/7996/files/14627622508.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/66900544890.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/waxorakupalejikumerufa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/36525777258.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2614/files/wabopob.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_off00006a3a.bin
7070b0ad8ab115b0a84f3ad19938fd1a7edfb01c78cf20787687511b6e8e199a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3A 5660 bytes
font_01_sfnt_off00007d6d.bin
6aeb810324ecbddd8409bd844b13fa34f7253ac5ee6f3e63c057628b15bd35e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6D 10032 bytes

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