Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa0a43e6c27b3ac…

MALICIOUS

PDF

33.4 KB Created: 2020-08-15 18:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17f0a7a907f97c9b037efb59f820aa61 SHA-1: f3196bb564cd36948df0151f5c0005fe698200f8 SHA-256: 0fa0a43e6c27b3aca5f991104c76dca2ca947726e84cb594e2f2dfd85c39e3cc
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=tagalog+christmas+songs+album+free`. This indicates a phishing or scam attempt, likely to deliver a second-stage payload or lead users to a malicious website. The presence of numerous external PDF links further suggests a link farm or SEO manipulation tactic to distribute malicious 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=tagalog+christmas+songs+album+free
    • http://rixorerod.zebini.com/uploads/1/3/1/4/131453540/465625.pdf
    • http://files.marypatwager.com/uploads/1/3/0/8/130814208/tamaximivuza_rudebemog_zateg_xapatonakafab.pdf
    • http://files.ulockitselfstorage.com/uploads/1/3/1/4/131409463/8436405.pdf
    • http://files.newcovenantinspections.com/uploads/1/3/1/3/131380063/9244010.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8051/5745/files/70956650756.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/bewezeger.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/jiwuzodusemuzagajatir.pdf
    • https://cdn.shopify.com/s/files/1/0431/0577/9878/files/zazolazonamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/15650118848.pdf
    • https://cdn.shopify.com/s/files/1/0434/9735/7472/files/ios_font_names.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/26502318991.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1513/files/92811689260.pdf
    • https://cdn.shopify.com/s/files/1/0440/2626/5765/files/9756529848.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7581/files/84777206784.pdf
    • https://cdn.shopify.com/s/files/1/0447/1242/7674/files/cardiovascular_disease_research.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8773/files/aatish_episode_13.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_off00004437.bin
51bd90fc12d4457aba5e8ae55167c9dfa4f99a921dc469c74f533afbaeef4c0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4437 5384 bytes
font_01_sfnt_off00005664.bin
3ca71db543938fe45afee8cbfd5a56309d0f5a518741ad27dc77ab7cbdddfa75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5664 9552 bytes

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