Malicious PDF — malware analysis report

Static analysis result for SHA-256 686365c3682c5d16…

MALICIOUS

PDF

42.8 KB Created: 2020-08-17 04:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed04ca1b4d2df7c027fd5a1f495c6414 SHA-1: 868a032156c2dc281598cdb47b3fd7002258d421 SHA-256: 686365c3682c5d166b2be76fb25c443dfa5c71bf98aa5043003cce8394abafb0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure (ttraff.com). This suggests the document is designed to lure users to malicious websites, likely for phishing or scam purposes. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to obscure the malicious destination. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=proper+business+letter+format+with+cc
    • http://files.movement-arts.net/uploads/1/3/1/1/131164479/kezuruxawa.pdf
    • http://files.ninilchiklibrary.org/uploads/1/3/2/6/132682897/8444798.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vujunuvitiwowus.pdf
    • https://cdn.shopify.com/s/files/1/0434/3185/4247/files/88837442938.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/slack_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0440/6634/1029/files/wepineluz.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/sifizamepegaxidaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/afman_23_122.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9136/files/bank_exam_preparation_books.pdf
    • https://cdn.shopify.com/s/files/1/0437/7536/1178/files/97028810854.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068c3.bin
b00dee2fcaeda60830c047526337be8e3c1767a7d3123a444181535f763a903a
pdf-font-stream PDF embedded font (sfnt) at offset 0x68C3 5488 bytes
font_01_sfnt_off00007b4a.bin
2eb93a2770ec51ad39da74ae2f3f5ce92311016955424539e41007a3c40950c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4A 10316 bytes