Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9fe15cad4b6e12a…

MALICIOUS

PDF

62.5 KB Created: 2020-08-24 16:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a2554420b25ade0d0c7ff8b4f4f3750 SHA-1: 42b19825b4591a6aa71866e47eb644bab71da4d0 SHA-256: c9fe15cad4b6e12af6e889edce65421f63cbb904d515109eab4ac10b3168b50b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Another heuristic indicates a PDF link farm, with many links hosted on cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of malicious redirector links and the link farm suggests a phishing or malware distribution attempt.

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=acadia+national+park+guide+pdf
    • http://lozom.findahappybalance.com/uploads/1/3/2/7/132740978/030aad73e6.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/68024098749.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/83985342241.pdf
    • https://cdn.shopify.com/s/files/1/0460/1354/6657/files/10846555002.pdf
    • https://cdn.shopify.com/s/files/1/0436/6427/7657/files/algorithms_illuminated_part_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/intellectual_property_powerpoint_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fatexuxutul.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/munudefoboliwuritalugu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0730/files/43312230695.pdf
    • https://cdn.shopify.com/s/files/1/0433/7421/5331/files/zasemimusulemogusop.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/ritabovurafovunuxilikuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0932/files/84639512079.pdf
    • https://cdn.shopify.com/s/files/1/0435/5178/5109/files/dusigep.pdf
    • https://cdn.shopify.com/s/files/1/0439/2858/4347/files/7706173851.pdf
    • https://cdn.shopify.com/s/files/1/0434/0059/3557/files/zemorawirodor.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b692.bin
62cec15274022bcbf0c583e408c0489bafb078aa242df8ffcca632b2dd2edd05
pdf-font-stream PDF embedded font (sfnt) at offset 0xB692 5196 bytes
font_01_sfnt_off0000c84d.bin
55dca9d99a3e007b2bff4fbe5e21dcf3add4da112e48991a642e0438e673f7cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xC84D 10676 bytes