Malicious PDF — malware analysis report

Static analysis result for SHA-256 362d17fde397c4de…

MALICIOUS

PDF

32.2 KB Created: 2020-08-10 09:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30fb3bf1b2e35dfd77bebd6e96e2969e SHA-1: 81998826828e4e50815b0742b7927831b82050dd SHA-256: 362d17fde397c4de0012bcba9f57f511efdf96c1d10964357ed1f68a9c81662d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a free book download, which is a common lure for phishing or malware delivery. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure. The embedded URLs, particularly the one pointing to 'ttraff.com', are highly suspicious and likely serve as the initial stage for a broader attack. No scripts were extracted from this sample.

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=chava+book+pdf+file+free+download
    • http://bifexo.swanleeartdesign.com/uploads/1/3/2/7/132712615/gelulitenimiwu.pdf
    • http://files.islandercars.com/uploads/1/3/1/4/131437552/7d312827.pdf
    • http://files.elisemoran.com/uploads/1/3/1/4/131453453/ligetalujimo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3151/7605/files/40507451386.pdf
    • https://cdn.shopify.com/s/files/1/0431/0591/0935/files/99046500291.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5308/files/wedogomodekaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/18949557522.pdf
    • https://cdn.shopify.com/s/files/1/0432/8652/8155/files/31458037872.pdf
    • https://cdn.shopify.com/s/files/1/0434/4689/4758/files/bridge_to_terabithia_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/74612061217.pdf
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/exalted_autochthon.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/nuxabakupirebotapadakizi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdf
    • https://cdn.shopify.com/s/files/1/0431/3494/3388/files/33318745896.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://blueladyindia.blogspot.in/2017...Since
    • 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_off0000430f.bin
bee45a312eb6161ca0a79a697044447ab6f5dea0beaf71d5832b5ce1e015baa8
pdf-font-stream PDF embedded font (sfnt) at offset 0x430F 5212 bytes
font_01_sfnt_off000054cf.bin
9db6b3613f3d44bdf54bcf74e9b1e523ac5b2f601f72b9e532f6027707752e15
pdf-font-stream PDF embedded font (sfnt) at offset 0x54CF 8840 bytes