Malicious PDF — malware analysis report

Static analysis result for SHA-256 6251a9ca44641cca…

MALICIOUS

PDF

41.9 KB Created: 2020-11-06 13:57:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b40aab6ab6848d027b87e21e273395f SHA-1: 1e845583dbcc66c56fb02d3bfa64623fb6b407fb SHA-256: 6251a9ca44641ccab95f03a85a181e3d6de4b3732684d264a1bc5421eff72fb4
96 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a primary link to 'traffking.ru' disguised as a psychology PDF. The ML classifier strongly flagged this PDF as malicious. The presence of many external links, including a link farm heuristic, suggests an attempt to manipulate search engine results or redirect users to malicious content, potentially for SEO spam or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/123?keyword=saundra+k+ciccarelli+psychology+pdf
    • https://xigolomo.weebly.com/uploads/1/3/4/4/134483438/f96e2.pdf
    • https://silemixijotin.weebly.com/uploads/1/3/4/4/134463531/793959.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zaxawetawupo/sport_head_ice_hockey_unblocked.pdf
    • https://s3.amazonaws.com/libosokune/13318125601.pdf
    • https://s3.amazonaws.com/purixifusipelid/blackmart_apk_download.pdf
    • https://s3.amazonaws.com/felasorarabipis/wileruzobokokazafovejav.pdf
    • https://s3.amazonaws.com/pibajuwi/class_12th_sociology_notes.pdf
    • https://uploads.strikinglycdn.com/files/459b6f6a-5560-48f0-b2a3-1320d28358b5/36779877105.pdf
    • https://s3.amazonaws.com/padoragog/rujalejav.pdf
    • https://uploads.strikinglycdn.com/files/a4289521-24b5-4372-8eaf-eee53763e02b/new_york_driver_video.pdf
    • https://s3.amazonaws.com/subud/wunufebiwi.pdf
    • https://uploads.strikinglycdn.com/files/7a2efcfe-f8ea-4884-918d-73107950ab40/waluvizunata.pdf
    • https://uploads.strikinglycdn.com/files/0816ab04-a2c7-4852-a44e-97417c9d3f9e/the_jimmy_timmy_power_hour_2_full_movie.pdf
    • https://uploads.strikinglycdn.com/files/ee1611a9-a9de-48c1-8077-80425a152573/kikuzowanumex.pdf
    • https://s3.amazonaws.com/fasanag/risikaf.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_off000064cc.bin
a80d268858d1d57d8380b224177ae10bdbc131b2568530f6473e80e390b0ce80
pdf-font-stream PDF embedded font (sfnt) at offset 0x64CC 5688 bytes
font_01_sfnt_off00007830.bin
c2fac4f1197056232cdb8097593c18a58eb76ccedb81d3c53d17ae71d2f4b5ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x7830 9964 bytes