Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9a9211da01182e…

MALICIOUS

PDF

43.2 KB Created: 2020-08-17 10:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a00b09abc6edfcd0731c45d5bdb4ed2b SHA-1: 850b917955bde45316fe23941278a68af7c2a8b7 SHA-256: 0c9a9211da01182ec8487a062c2ee2cc74c8ad47c1967c7170d651df4b290b9d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body also contains this URL, suggesting an attempt to redirect users to potentially harmful content under the guise of 'natural landscape images hd'. The presence of numerous external PDF links, many pointing to Shopify, indicates a link farm SEO tactic, likely to improve the ranking of the malicious redirector.

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.ru/pify?keyword=natural+landscape+images+hd
    • http://files.datumautomation.com/uploads/1/3/1/4/131437119/zesuzijafipeku_tinurop_pulefeg_zijusuxadalen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/addressing_modes_with_examples_in_computer_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/fovawizexoza.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/cosmic_eye_watcher_badge.pdf
    • https://cdn.shopify.com/s/files/1/0427/5719/3895/files/boganasumubus.pdf
    • https://cdn.shopify.com/s/files/1/0436/7073/2950/files/certificado_medico_escolar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/memexekevitaziki.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/88937488932.pdf
    • https://cdn.shopify.com/s/files/1/0435/7731/1391/files/xopaxipi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3846/files/pikurolugoburuwudigoxew.pdf
    • https://cdn.shopify.com/s/files/1/0449/3633/1419/files/didopevulugug.pdf
    • https://cdn.shopify.com/s/files/1/0433/9345/0134/files/6101383671.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000491e.bin
89e15769a53516d94121f8db4cf7f05c270dffd8a77b4616fb82a7e2576f8f84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x491E 5228 bytes
font_01_sfnt_off00005ab0.bin
7f0be1323455ef8ce7fb1d1d4cb91082bdfd239a0ca6ab56294d5ffd76fcbae1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB0 9888 bytes
font_02_sfnt_off00007cbe.bin
f469c5aa689aa4c1965481b78cfaebbf1c3ebdad2306c7067134b7b4aaa0addd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBE 16164 bytes
font_03_sfnt_off000091b7.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91B7 4324 bytes

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