Malicious PDF — malware analysis report

Static analysis result for SHA-256 6566e3af51201cc5…

MALICIOUS

PDF

47.7 KB Created: 2020-08-06 23:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02f60daea3bddc4473869d0accc420a4 SHA-1: 80e293c2bde9a73764895ff0034f4308b3a0e9b3 SHA-256: 6566e3af51201cc5a1a6f2adae7f3f5bd97cf8f6b39bc0b1b4b66fdfe8443b29
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=the+odyssey+book+10+pdf'. The presence of a link farm and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to malicious content or phishing sites. The document body text, though heavily obfuscated, contains the same lure URL and other PDF links.

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=the+odyssey+book+10+pdf
    • http://nixovudad.kinsellamitchell.com/uploads/1/3/1/4/131437513/7109614.pdf
    • http://files.euacademycs.org/uploads/1/3/0/8/130873941/mukujujipagegef.pdf
    • http://files.yoloenergywatch.org/uploads/1/3/0/7/130775677/xewari_bimarapon_buvefelulasok.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/4881/0149/files/mazopavuteb.pdf
    • https://cdn.shopify.com/s/files/1/0431/2632/5402/files/biriwusotisokif.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/xibudiwidowevelurilefexuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/ashrae_handbook_of_fundamentals_1997.pdf
    • https://cdn.shopify.com/s/files/1/0430/9359/0170/files/72199975695.pdf
    • https://cdn.shopify.com/s/files/1/0430/9028/0609/files/xaraxomizebulexoxademe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9063/2101/files/neroganukujegusatenab.pdf
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/nifusademonuwokomakizi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0446/8134/files/wokedegadupuvidow.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/pixumumatejiro.pdf
    • https://cdn.shopify.com/s/files/1/0439/7613/0718/files/advanced_english_practice_tests.pdf
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/nilifukuvabufebewumegeze.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_off00007d8b.bin
3c2a1f25f63bba311aa421f34a6cf29171787bdc296281ddd9b95f0239afd38a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8B 5240 bytes
font_01_sfnt_off00008f6f.bin
6ce4ea40f1c93b802fd509bbceb2e679534240aaac877905b8e7b8e9a6e1fdd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6F 10436 bytes

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