Malicious PDF — malware analysis report

Static analysis result for SHA-256 5216286bb025d247…

MALICIOUS

PDF

40.5 KB Created: 2020-08-03 14:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f2d127f38b7534fe130c193aedad564 SHA-1: 36d8c207398e6107fb456aa721a6ededd90ef125 SHA-256: 5216286bb025d247066b94acf9ee3cbe9cd8c0ecdc80c655f9d5a1a238098f11
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary link pointing to a redirector service (ttraff.cc). This suggests a phishing or malicious content delivery attempt, where the redirector is used to obscure the final destination. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links further supports this assessment. No scripts were extracted, limiting the analysis of direct execution behavior.

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.cc/pify?keyword=alive+character+design+pdf
    • http://files.biblebaptistchurch-danvillewv.com/uploads/1/3/0/7/130739163/1802537.pdf
    • http://files.churchesofchrist.com/uploads/1/3/1/4/131438819/jemej-wurikuzegimu-veduro.pdf
    • http://files.clarityautoglass.com/uploads/1/3/1/4/131453894/152156.pdf
    • http://files.suitsswagger.com/uploads/1/3/1/8/131856333/kivoziludidotuto.pdf
    • http://files.rubysgift.net/uploads/1/3/1/0/131069887/ravelojinifa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/61648097893.pdf
    • https://cdn.shopify.com/s/files/1/0435/0119/1328/files/list_of_adventure_time_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6200/files/26808155547.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/7058598603.pdf
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/nolivifejimukojexinux.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9621/files/pogasegopap.pdf
    • https://cdn.shopify.com/s/files/1/0437/7971/9317/files/toxuseduna.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/zenube.pdf
    • https://cdn.shopify.com/s/files/1/0436/6155/7913/files/zolukixikegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sasukeseduvemuledup.pdf
    • https://cdn.shopify.com/s/files/1/0433/8748/6358/files/art_of_game_design_book_of_lenses.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/pozis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93515438816.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_off00006056.bin
4c97e615cc15520143ffd590ed924b5562c92b4644d808c2e7909f3b21813e83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6056 5464 bytes
font_01_sfnt_off000072f0.bin
f2541168c0465ad8908eb902cd3ff3606178c930e735ac0a949cd1d2796fc315		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F0 9932 bytes

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