Malicious PDF — malware analysis report

Static analysis result for SHA-256 f700b2af0e2a70de…

MALICIOUS

PDF

43.7 KB Created: 2020-08-22 21:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c84ed12a811922eddf7b7bc7cbb7edd8 SHA-1: ecd209153ba4d79f9d6402994b3e2bf2fa116572 SHA-256: f700b2af0e2a70de13279432887dd3ab960b9d2968a5d38a18bfdb2a4c3fa8ed
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other links, many pointing to Shopify domains, indicates a link farm strategy to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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=melody+of+the+night+piano+sheet+pdf
    • http://vazajet.bodytherapybydai.com/uploads/1/3/1/4/131438216/fa57177d6b0b0.pdf
    • https://cdn.shopify.com/s/files/1/0431/2550/6208/files/budgeting_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/adding_and_subtracting_polynomials_matching_activity.pdf
    • https://cdn.shopify.com/s/files/1/0434/6819/3952/files/puxejuzimadivorifa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2678/files/cambridge_primary_curriculum_framework.pdf
    • https://cdn.shopify.com/s/files/1/0435/2419/4468/files/1945969242.pdf
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/cakephp_form_validation_rules.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/bocio_mergulhante.pdf
    • https://cdn.shopify.com/s/files/1/0433/9102/5303/files/kitave.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/12658810506.pdf
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/wetolaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6451/7023/files/98084394657.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/81844699623.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_off00006052.bin
90a310313cf062c33be6b889fde31b85bc9388dac897b0acb1d1952f55d00ac5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6052 5312 bytes
font_01_sfnt_off0000726d.bin
e98475ede6f8711a86fdedd156db180effcadf83d580c316d0aa3a28ee493e35
pdf-font-stream PDF embedded font (sfnt) at offset 0x726D 14432 bytes