Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00d7cd2c98c3d34…

MALICIOUS

PDF

42.2 KB Created: 2020-08-22 11:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4aff61b247a5de7380f278c829bb985 SHA-1: f1cb9f981543a32920b9aecdfc87ccf4e2611d53 SHA-256: b00d7cd2c98c3d348e7fec58a3763cbb8a90507531d8c288942338bde5013856
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'saaq car valuation guide' and the malicious URL, suggesting a lure. The presence of a link farm and a critical heuristic firing for malicious redirectors strongly indicates a phishing or redirection 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.com/pify?keyword=saaq+car+valuation+guide
    • http://lilej.kesimforcouncil.com/uploads/1/3/1/4/131454762/gokaref.pdf
    • http://files.portageresourceguide.com/uploads/1/3/1/6/131606644/8719065.pdf
    • http://files.berkshireheroes.org/uploads/1/3/0/7/130740338/zaduneli_sovovegijisaza.pdf
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/74943712905.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/interventional_cardiology_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/0051/1138/files/jozavovilegomapisuzibikus.pdf
    • https://cdn.shopify.com/s/files/1/0434/3631/0693/files/31730335007.pdf
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/98993956886.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/vepepixa.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/25499719641.pdf
    • https://cdn.shopify.com/s/files/1/0433/0582/8520/files/bemutuzuritijolibi.pdf
    • https://cdn.shopify.com/s/files/1/0449/5376/3999/files/bipazirovawidopiwo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/magavifam.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/camera_nikon_d3500_manual.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_off000067ac.bin
9d920713219047da6efe8cc62f05ee76860616299bd3b49ffd4063983436e760
pdf-font-stream PDF embedded font (sfnt) at offset 0x67AC 5220 bytes
font_01_sfnt_off00007970.bin
d9f9243e2db61a38446041e354b225c3c6f6f8612b3aca2ea6ffb39140d2520a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7970 10240 bytes