Malicious PDF — malware analysis report

Static analysis result for SHA-256 af4d7967f5917a14…

MALICIOUS

PDF

40.3 KB Created: 2020-08-24 09:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d39ce227fb83e938e79a84f5ffd28f6f SHA-1: 1a86c1cc70f21d37d1ed7e4d03961e536f595a8c SHA-256: af4d7967f5917a14200d5dc7c25d9e606bbe0c5cbecb9a820a270cae9decbf99
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The document body contains text related to 'animal rescue game free' and numerous embedded URLs, including a suspicious one pointing to 'ttraff.cc', which is identified as a malicious redirector. The presence of a large number of external links, many hosted on Shopify, suggests an attempt to distribute malicious content or phishing lures through a link farm.

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=animal+rescue+game+free
    • http://nanawojik.yasminesinno.com/uploads/1/3/2/7/132740805/jizusorutikoworeru.pdf
    • http://files.senseabouthomeopathy.com/uploads/1/3/1/4/131406982/bidatofiligos-totavumoduvibo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3693/2253/files/nojetomogobur.pdf
    • https://cdn.shopify.com/s/files/1/0439/7246/0702/files/jibolog.pdf
    • https://cdn.shopify.com/s/files/1/0435/1996/7386/files/32897844437.pdf
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/piluvuv.pdf
    • https://cdn.shopify.com/s/files/1/0441/2856/7448/files/10870260534.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7118/files/equipments_and_materials_for_animal_cell_culture_technology.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/13476018507.pdf
    • https://cdn.shopify.com/s/files/1/0437/5845/2897/files/1995_ford_f150_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5965/9420/files/6th_pay_commission_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/7555/7793/files/wufasomejoziviri.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_off0000603a.bin
71224052a5ad7cb7f3c0db3e483d3c9827712182c4e4358653847133d83243e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x603A 5192 bytes
font_01_sfnt_off000071bc.bin
c0d3efda7f4ef35c350fde751643e8d877a7fa2284a24519a8c382567ff658d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x71BC 10352 bytes