Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e5bbf338156b6d0…

MALICIOUS

PDF

57.7 KB Created: 2020-08-22 17:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4831ef3fe17158d9434c53b8a5c0e265 SHA-1: 1ed2feb75c65af7ac9024593368ac2fad7f907e2 SHA-256: 6e5bbf338156b6d087379cd473c3933c9cfc1efff4e4a62c8c300fac7d5d0e43
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document acts as a lure, using a seemingly innocuous topic ('Alteraciones del ciclo menstrual pdf 2017') to entice users. It contains a large number of links, including a critical redirector link to 'ttraff.com', suggesting a phishing or malicious content distribution scheme. The presence of a password-protected archive lure heuristic further indicates an attempt to bypass security controls.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=alteraciones+del+ciclo+menstrual+pdf+2017
    • http://files.bscapitalmarkets.com/uploads/1/3/1/6/131607712/1bae8a1c.pdf
    • http://files.vbesptu.com/uploads/1/3/1/4/131438692/02fe0b2beb5da8.pdf
    • http://jazuk.northlakesliving.com/uploads/1/3/1/4/131453870/093cc9b7.pdf
    • http://files.navigatealzheimers.com/uploads/1/3/0/8/130874257/8fe7333dd9d.pdf
    • http://files.reidgarcia.com/uploads/1/3/2/7/132740485/908164b5a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6049/4490/files/rekexejofeji.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/mizakufemoxopikoxive.pdf
    • https://cdn.shopify.com/s/files/1/0429/0904/0803/files/kamojikazi.pdf
    • https://cdn.shopify.com/s/files/1/0449/8125/6360/files/essential_hematology_and_clinical_pathology.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/pojavekatefizozerimupip.pdf
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/flamenco_guitar_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0428/6529/5526/files/buguruwugesidoje.pdf
    • https://cdn.shopify.com/s/files/1/0432/7358/4793/files/98878025625.pdf
    • https://cdn.shopify.com/s/files/1/0428/8980/5983/files/gumegawawamozokugupozij.pdf
    • https://cdn.shopify.com/s/files/1/0429/1641/3607/files/34044852892.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/remazimuladeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7181/files/wisconsin_title_application.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_off0000a141.bin
76c516471a06de5cbbf0c8e65539f3c326f515f08f72b54f84c03e038da8e1d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA141 5696 bytes
font_01_sfnt_off0000b48f.bin
b6d6e2b4288a50ba93f536c7eb383c1e003279f80642536e6cf3a073f385189c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB48F 11404 bytes

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