Malicious PDF — malware analysis report

Static analysis result for SHA-256 8269d2e3c547c274…

MALICIOUS

PDF

43.1 KB Created: 2020-08-06 08:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ec6abdb055d0958b77f006515354a5a SHA-1: c7e17ad37045367cacf53c9b02899508d4a20dd5 SHA-256: 8269d2e3c547c2745cd73ac6a58b5154ae52ab81cf80e92698c7006bf2bd8886
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. This suggests the primary purpose is to redirect users to malicious content, likely for phishing or to download further malware.

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=asana+pranayama+mudra+bandha+bihar+school+of+yoga+pdf
    • http://files.ciecanswers.com/uploads/1/3/1/6/131606818/zarajumus.pdf
    • http://files.birthbliss.co.uk/uploads/1/3/1/4/131452741/94b234481253.pdf
    • http://files.sunyu.com.sg/uploads/1/3/1/4/131409244/d9086890bb.pdf
    • http://files.emmashugs.com/uploads/1/3/1/3/131379832/zajaxidorilekuver.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/garewosabumulezetu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wopeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/pefoxanaku.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2767/files/21717760521.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fatexuxutul.pdf
    • https://cdn.shopify.com/s/files/1/0435/3975/9259/files/github_best_practices.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/katovojoxikanusefite.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/jurimuliwidajetekul.pdf
    • https://cdn.shopify.com/s/files/1/0432/6631/0299/files/27744224374.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3170/files/borawukevubid.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/vmc_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/9426/9333/files/60532235911.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_off0000687d.bin
8c353c4fda542fadf7afd723698ed1cd7bdb6c301e5f1b8b0bb623f5b67f6bb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x687D 5800 bytes
font_01_sfnt_off00007c1f.bin
08c7c0ff3219cb984f2635c8df67b8858ccb7b7b48a069c2f585af9755ba3a7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1F 10268 bytes