Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc22a0e48c0d69a…

MALICIOUS

PDF

44.1 KB Created: 2020-08-13 23:38:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d757ce98691b8fdb8636274580dd4041 SHA-1: 3d9d850526afb205b1fbaa0209901aa2eeffc091 SHA-256: 7cc22a0e48c0d69a571a6e9be7141f67d9f3eba12ab81930a158e102d545d7ca
152 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document also features a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector and link farm.

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=gta+5+spaceship+parts+guide
    • http://files.alisondowell.com/uploads/1/3/1/3/131383942/soroguvefoji.pdf
    • http://ziporateb.jodiunruh.com/uploads/1/3/0/8/130814328/639810.pdf
    • http://files.nutripol.org/uploads/1/3/2/8/132814371/monamodor_noxuwebiredam.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/48969985885.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/gopro_hero_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0250/files/botitajuk.pdf
    • https://cdn.shopify.com/s/files/1/0447/1911/2345/files/xovigivemaneli.pdf
    • https://cdn.shopify.com/s/files/1/0437/2047/4779/files/macro_sociological_theories.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1463/files/39817779552.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/html_page_to_using_php.pdf
    • https://cdn.shopify.com/s/files/1/0431/1321/8210/files/52915678193.pdf
    • https://cdn.shopify.com/s/files/1/0431/4660/8794/files/bilukulizemitis.pdf
    • https://cdn.shopify.com/s/files/1/0450/2549/3150/files/arihant_general_awareness_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8242/files/zefevesorozog.pdf
    • https://cdn.shopify.com/s/files/1/0437/2194/9335/files/minecraft_xbox_360_mods_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/4151/2855/files/business_law_clarkson_14th_edition.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_off00006e4a.bin
3be3bc14aba7fe4c6f242b0f9647deaaf7a702058e0d5437f06c50ece0853f86
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4A 5456 bytes
font_01_sfnt_off000080d5.bin
c6ff1b909078d54a37bf2e3ce9781f369837d35cd7bdded19886bd1b4dccede5
pdf-font-stream PDF embedded font (sfnt) at offset 0x80D5 10212 bytes