Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aba4d73bcc5852c…

MALICIOUS

PDF

60.4 KB Created: 2020-08-09 04:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6906db0b7757d80817b8dd8f03cd504 SHA-1: 74e11966810cba0ec84361e5c63e7276ea9ffca6 SHA-256: 0aba4d73bcc5852cde5e7cd674036d5a748560dfc9afbf01888ce30dea0e1b6d
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a link farm designed to redirect users to potentially malicious content. The primary malicious URL identified is a redirector that appears to be part of a phishing or scam campaign. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to obscure the final destination and potentially distribute malware or lead to phishing sites.

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.com/pify?keyword=ablaze+for+god+wesley+duewel+pdf
    • http://files.cacmun41.org/uploads/1/3/1/4/131406337/kusit-lamapufusura-dunarufojibod.pdf
    • http://solenigik.actionsforhealthcare.com/uploads/1/3/1/6/131606490/3464707.pdf
    • http://xugawa.opensshdownload.com/uploads/1/3/1/4/131406390/4172792.pdf
    • http://files.sommewino.com/uploads/1/3/2/6/132680852/cfe147.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/29999475096.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6269/files/padejilimugefi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1189/7504/files/74100523935.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/7135728910.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/53950145474.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0354/files/how_to_delete_discord_messages_fast.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4564/files/81341451703.pdf
    • https://cdn.shopify.com/s/files/1/0428/6126/5062/files/91365071195.pdf
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/thermodynamics_an_engineering_approach_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0439/0469/6472/files/minakixawiruxujitoduz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/pobupunekiwa.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_off0000ad88.bin
061dd7865eed10967ecd41215fe8a325b8c9f58407c579f7604aa60d2d360901
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD88 5584 bytes
font_01_sfnt_off0000c0bc.bin
366457b0c65345e231be48ff0462a2108f95fdcc46d8554b4f279a9e3c425eca
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BC 10760 bytes