Malicious PDF — malware analysis report

Static analysis result for SHA-256 f304bc6a8e40266b…

MALICIOUS

PDF

52.4 KB Created: 2020-08-27 23:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23a3c75727834d4c98faf6374ebf93e0 SHA-1: f39832304e50f8c39a79b0223a445051e7f9338d SHA-256: f304bc6a8e40266bef3792d0b46284b148d415f51b20bcf3449bea9cc0416e13
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, many pointing to PDF documents hosted on Shopify. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=p5n-+e+sli'. The presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious content or exploit search engine optimization techniques for malicious purposes. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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.cc/pify?keyword=p5n-+e+sli
    • http://tabetixa.gsm-eu.com/uploads/1/3/0/8/130874359/pegoradogud.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/agile_project_management_for_dummies_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0450/2441/1806/files/baricco_iliade.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/59024557566.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/jayz_the_prelude.pdf
    • https://cdn.shopify.com/s/files/1/0436/6427/7657/files/74269470286.pdf
    • https://cdn.shopify.com/s/files/1/0463/3116/6881/files/filemaker_server_17_installation_and_configuration_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/bunekataporipazolujidukij.pdf
    • https://cdn.shopify.com/s/files/1/0448/0519/3885/files/additive_manufacturing_types.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6936/files/socialdemokraterna_partiprogram.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/sudujudonazabodipigow.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4340/files/south_carolina_driver_s_handbook.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007705.bin
f6767c19c71281124c53013c58cfb1bfa3184878a1424f2e68f3b2aa01d213f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7705 4128 bytes
font_01_sfnt_off00008501.bin
ae11bc5dc489b27d10620f3cf0c9df815b14d783b26adb6a764ef65d6cacc6c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8501 15796 bytes
font_02_sfnt_off0000b55b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xB55B 4324 bytes