Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6157909d640108…

MALICIOUS

PDF

34.1 KB Created: 2020-08-15 03:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c821daa001ec6a97e77d7117b4ed99c8 SHA-1: 54fa4b5a4d803d0f71ce8e5395268aad47b0e7fd SHA-256: cb6157909d640108946049dfe92dea2bcb5b9fc9df77c60d9d4e5dabec06b560
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a primary link pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=futsal+score+sheet+template'. The document body, though heavily obfuscated, contains text related to 'futsal score sheet template', suggesting a lure to entice users to click the malicious link. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to redirect users to harmful content.

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=futsal+score+sheet+template
    • http://bovafu.frontierfamilyfarms.com/uploads/1/3/0/8/130814328/924166de5d.pdf
    • http://files.nbhsffa.com/uploads/1/3/0/8/130814432/9279288.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3616/files/cardboard_gun_blueprints.pdf
    • https://cdn.shopify.com/s/files/1/0431/6807/1836/files/4319934511.pdf
    • https://cdn.shopify.com/s/files/1/0435/5283/3695/files/vepefapunizimasudenuxol.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/jakitagurugunuxema.pdf
    • https://cdn.shopify.com/s/files/1/0437/8063/6833/files/45294688049.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/biryani_recipe_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/7535513589.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/29833822507.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/the_godfather_part_2_full_movie.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000491e.bin
f07d654ac9abf275c8199fd3f5f8e328eda72da0ff6961c48225d855f46c8e8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x491E 5128 bytes
font_01_sfnt_off00005a5d.bin
9c497ac508d6d4f04d373ce5f6de0555aaca0b7cd2928deb0c2a90205d036322
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5D 9956 bytes