Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b06181b68fa1bff…

MALICIOUS

PDF

37.2 KB Created: 2020-08-22 00:40:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fac4df80c999592ed898b13684e325c SHA-1: b76d79d8abf14bcdfce997c915541f3f35db1220 SHA-256: 6b06181b68fa1bff64d1099f31af551c38478586f7391f1a8fe50ec2a1d1fb09
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to lure users to malicious sites, likely as part of a phishing or scam campaign.

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=uppercase+and+lowercase+letter+tracing+sheet
    • http://files.mishpuchacamping.org/uploads/1/3/0/9/130969525/litebakiromowilevuwo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1959/2099/files/kidekikimarutevekexe.pdf
    • https://cdn.shopify.com/s/files/1/0441/3489/1672/files/basic_networking_objective_type_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/8220/2782/files/microsoft_access_database_templates_2016.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/36483568180.pdf
    • https://cdn.shopify.com/s/files/1/0431/1633/1172/files/kinokaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1354/files/83432088954.pdf
    • https://cdn.shopify.com/s/files/1/0437/0615/5173/files/introduction_to_astronomy_and_astrophysics.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/gimp_save_as_png.pdf
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/pl_sql_interview_questions_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1068/files/lifetime_mission_statement.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/mixulevogafisubured.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6475/files/51966219906.pdf
    • https://cdn.shopify.com/s/files/1/0432/5965/8398/files/32935052595.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/sample_neurological_assessment_report.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_off000052dd.bin
14c92835eadcf173692bc9d269342d1ddf2ed7d137766e98d3f92ec3addf2352
pdf-font-stream PDF embedded font (sfnt) at offset 0x52DD 5420 bytes
font_01_sfnt_off0000654e.bin
56917b300df36bf2747ec1eced49b82a5fc6d8d84e164658e4ffc786388bb385
pdf-font-stream PDF embedded font (sfnt) at offset 0x654E 10096 bytes