Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b68963745dad3c…

MALICIOUS

PDF

41.6 KB Created: 2020-08-20 23:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9bf0b6a7c1bba04c49440a745239bb1 SHA-1: f6b34a05bdfa4339375b267e7f8642ff6805a35e SHA-256: 74b68963745dad3c92b4abffae32dafd5a37f8c36f6ec6519257d98b0d8c9da7
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for distributing malware or leading users to phishing sites. The document body, though obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or to host further 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.cc/pify?keyword=mariam+khan+reporting+live+song+lyrics
    • http://files.camarillocommunitygardens.org/uploads/1/3/0/8/130813846/xixiwige.pdf
    • http://files.phsdbteam.com/uploads/1/3/1/4/131407958/682254.pdf
    • http://files.areaokc.com/uploads/1/3/0/8/130813851/530db.pdf
    • http://files.northchesterbaptist.com/uploads/1/3/1/3/131379999/basirevo.pdf
    • http://wipet.ugaswimanddiveclub.com/uploads/1/3/0/8/130874246/nosibovi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/xelonuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/3455/0173/files/bafinowit.pdf
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/21297407255.pdf
    • https://cdn.shopify.com/s/files/1/0437/5173/5448/files/vipuzerawujalotazunazub.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1957/files/86097038282.pdf
    • https://cdn.shopify.com/s/files/1/0437/5638/8510/files/36245826459.pdf
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/68336367695.pdf
    • https://cdn.shopify.com/s/files/1/0434/2670/9665/files/bhagavad_gita_slokas_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/7421/6351/files/69_things_i_wish_i_knew_before_marriage.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_off00006394.bin
48156ed36a90130a768db0f8c01adfa56f357423ebf1b036e97db971c5651d67
pdf-font-stream PDF embedded font (sfnt) at offset 0x6394 5580 bytes
font_01_sfnt_off0000767e.bin
ea5cc7b608565046b07c15c2a567ccb0fe3d5ba1246015bf554ec566ed4d088a
pdf-font-stream PDF embedded font (sfnt) at offset 0x767E 10352 bytes