Malicious PDF — malware analysis report

Static analysis result for SHA-256 604344bf19378f97…

MALICIOUS

PDF

37.8 KB Created: 2020-08-20 12:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15894596fc787cb1a60fd2eab3cef8a4 SHA-1: 08fb6612f6c2b31c4ea9a8ec421278617e2a4cd9 SHA-256: 604344bf19378f978cf44fda1402ec7ad244c2598bdbba258d87dc6d9fc4d0b1
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a redirector service, which is a common technique for distributing malware or phishing pages. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate malicious intent, with the primary link being to 'ttraff.cc'. The document body, though heavily obfuscated, contains the text 'Flight training magazine' and the malicious URL, suggesting a lure to entice users to click the link. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=flight+training+magazine
    • http://files.hilarymurphyphotography.com/uploads/1/3/1/4/131407802/liwevenepi-nebefifovogaj-zikafi-nidekuvunimu.pdf
    • http://files.unad.agency/uploads/1/3/1/4/131437535/9942607.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/4976379337.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/bajamorotez.pdf
    • https://cdn.shopify.com/s/files/1/0437/2204/7637/files/ave_maria_gounod_soprano.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7804/files/aconsejamiento_pastoral_bernardo_stamateas_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/gikejid.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/72060748859.pdf
    • https://cdn.shopify.com/s/files/1/0440/6794/6648/files/antiphospholipid_syndrome_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9602/files/76113855139.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/43875077715.pdf
    • https://cdn.shopify.com/s/files/1/0429/8381/7375/files/a4988_stepper_driver_datasheet.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_off000057b3.bin
82ea9133dd0f847a3b511f52ccb7eb487ffed5fa1524406eaad5c8c46d2a00c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x57B3 4924 bytes
font_01_sfnt_off0000684d.bin
36f9f3fa17dba0c079f528fa6ecec80008cbf9f3573ccbc512026773900df4ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x684D 10180 bytes