Malicious PDF — malware analysis report

Static analysis result for SHA-256 05abf6645f4c18c7…

MALICIOUS

PDF

49.7 KB Created: 2020-08-11 15:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb65d6fe6606ceefdc4d869038d8cfb0 SHA-1: cc7fd424d8f57d09d26065714d1fc87b6099f8c5 SHA-256: 05abf6645f4c18c73b7c79f2c9ca5146eda9bf0fbd9432905d03aa86d70b6976
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to drive traffic.

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/wb?keyword=induction%20motor%20calculation%20pdf
    • http://files.lorraineparishwriter.com/uploads/1/3/0/8/130873870/lobojixo.pdf
    • http://files.diabolicalwhimsy.com/uploads/1/3/1/4/131406717/litunijup.pdf
    • http://maxamufez.voltaassociates.com/uploads/1/3/1/3/131379246/4974207.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4085/0598/files/6085913391.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0074/files/agreement_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/2274/4741/files/35115016081.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/gemepebabib.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7305/files/sleep_apnea_patient_handout.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3215/files/triceps_workout_routine.pdf
    • https://cdn.shopify.com/s/files/1/0429/8552/1311/files/catarina_a_grande_robert_massie.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/jedefagamugisom.pdf
    • https://cdn.shopify.com/s/files/1/0440/0755/5222/files/recursive_descent_parsing.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/xetazalepakipufuguzotu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6078/9409/files/joel_osteen_become_a_better_you_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/4977/7312/files/71149496270.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_off00007e29.bin
4c7fd2962e42421a2ae3701d68778538c4afaec8f8d0f1b85f226250e44d3507
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E29 5060 bytes
font_01_sfnt_off00008f3c.bin
95871d87d91b02617d60f551abf3780f48e4556bb6a73973959408305daa5fb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3C 13356 bytes