Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c350f4316a96494…

MALICIOUS

PDF

44.3 KB Created: 2020-07-24 11:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 298be7629b3808fe67fd9b09e411c3f3 SHA-1: d88ea6ad1cf471357e679e44dc560788e6f7cc9a SHA-256: 7c350f4316a96494f32ad27f71046bb7b100c27a7cc5df63a478dde5c319d92d
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.ru). This suggests a phishing or scam attempt, where users are directed to malicious sites under the guise of providing content like 'Doraemon episodes in telugu videos'. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports this assessment.

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.ru/pify?keyword=doraemon+episodes+in+telugu+videos
    • http://files.cedarmilers.org/uploads/1/3/0/9/130969370/taxobuxafef-julile-damuliroged.pdf
    • http://files.glolures.com/uploads/1/3/2/7/132741429/nezakeb.pdf
    • http://files.ritamulford.com/uploads/1/3/1/3/131398504/xuvunosese-pikub-pabuda-nabudetu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/50029860069.pdf
    • https://cdn.shopify.com/s/files/1/0431/4670/7104/files/gumutiwudovofijo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/80256627755.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gasowezigubufavowi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1574/9281/files/wepolatutowotof.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2821/files/bizikemedabajupobajulusog.pdf
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/darinimojij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jenodilibaxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/66305712473.pdf
    • https://cdn.shopify.com/s/files/1/0431/5562/0006/files/92882624453.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19941062624.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/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gasowezigubufavowi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f5f.bin
8c33a22f46b0f50649dcc8bf8125abf17e8a4ff6c9d10586a966850f2ec48822
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5F 5220 bytes
font_01_sfnt_off00008109.bin
a0f7ca980418ee8d95c01af4f7ae8917308d11763fde8a1ea64a59dd6e9c6c9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8109 10300 bytes