Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a77bfb6a87417e4…

MALICIOUS

PDF

42.5 KB Created: 2020-08-22 12:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4599728daf6ad42fc748d67d0618a34 SHA-1: 2f458ba5c29f2d2ea9cbab78cc7cfd25adca146f SHA-256: 2a77bfb6a87417e47d44cf23f259d6ee96326a3e43cfcbec689ea55b29b5f314
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, identified as a link farm. One of these URLs, 'https://ttraff.ru/pify?keyword=bose+soundlink+mini+ii+bluetooth+speaker+manual', is flagged as a malicious redirector. The presence of numerous links, many pointing to Shopify domains but likely serving as a lure, suggests a phishing or malicious redirection attempt. The ML classifier also strongly indicated maliciousness.

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=bose+soundlink+mini+ii+bluetooth+speaker+manual
    • http://files.eaglecreeklavender.com/uploads/1/3/1/3/131398250/lopojurani-bikani-donugobujurulot-kugozetuxazal.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/87654716210.pdf
    • https://cdn.shopify.com/s/files/1/0440/5349/5958/files/compliance_audit.pdf
    • https://cdn.shopify.com/s/files/1/0432/2076/2783/files/journey_aaron_becker_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3345/1944/files/bezewivekapezovu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3778/4229/files/sokonowopidi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/fasudovijevumefowu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0703/9895/files/welefosigifuruju.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/just_already_and_yet.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/87369277469.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_off000066bf.bin
d3a702dfb170168a769f374c24b82797a4b120fb84c511a32a7a0a7340e612eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66BF 5452 bytes
font_01_sfnt_off00007912.bin
86699f06f3114380323d4be6371c198b9a2588606c1542af5978808093f4abcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7912 10608 bytes

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