Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d16adfe5a5a0f02…

MALICIOUS

PDF

43.6 KB Created: 2020-08-20 04:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13d244657b983f49c0a3ed696203345f SHA-1: b5d53defc39b7f7648d854f0ce6682535faa6d3c SHA-256: 0d16adfe5a5a0f02d960c25904f934f1e5a54e888430f988059ab22f77d25e33
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector at 'ttraff.com'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm tactic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the link farm behavior strongly suggest a phishing or malicious redirection attempt.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=how+to++audio+tracks+from+soundcloud
    • http://files.arthurdogsontodd.net/uploads/1/3/1/6/131606563/gilabigajidono-piwijixag.pdf
    • http://files.murdermysteryparties.com.au/uploads/1/3/1/0/131071167/balaxewixon_wivaram_kumur_lefidu.pdf
    • http://lixapilu.quintessencemc.com/uploads/1/3/1/4/131406082/doxujorokoraxuwi.pdf
    • http://files.jackandjamesapiaries.com/uploads/1/3/0/8/130813357/b82af519d40ac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8190/7870/files/jofova.pdf
    • https://cdn.shopify.com/s/files/1/0435/3438/5303/files/kogogok.pdf
    • https://cdn.shopify.com/s/files/1/0436/2013/9170/files/cmd_hack_codes_list.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/17478780052.pdf
    • https://cdn.shopify.com/s/files/1/0429/4708/4447/files/wufopub.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/84402858513.pdf
    • https://cdn.shopify.com/s/files/1/0434/0059/3557/files/2956165621.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63529720688.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/chopin_nocturne_sheet_music_e_minor.pdf
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/ruxemedetutaxula.pdf
    • https://cdn.shopify.com/s/files/1/0428/0867/2423/files/wamodoxupaz.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/
    • https://cdn.shopify.com/s/files/1/04
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ee6.bin
9e5d9b572eb9025f3e59a83604702de34722db683e79297ba03c0fca92e0003d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE6 5048 bytes
font_01_sfnt_off00006ffc.bin
814166e28880f75553d80353e4caf5787d815822465323f18518f7e2afbf76e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFC 10404 bytes
font_02_sfnt_off000093a5.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93A5 4324 bytes

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