Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b7d2eec998d8a6…

MALICIOUS

PDF

50.3 KB Created: 2020-08-10 10:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30e365ba99c670dd6142a5a2f64b0d29 SHA-1: 6de20fc4002db9ea002a5635e6928936534d9874 SHA-256: e2b7d2eec998d8a6de214507791218e00e6b6e8ca6ea34c08c096605ad4de9be
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary link pointing to a redirector service known to host malicious content. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to a phishing or malware distribution site.

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=retinopatia+diabetica+gpc+pdf
    • http://files.denverprotectiondog.com/uploads/1/3/2/7/132712323/8226611.pdf
    • http://xekeka.peteandlauren.com/uploads/1/3/2/7/132712615/7488917.pdf
    • http://lifolus.risenkingchurch.com/uploads/1/3/1/6/131606875/8951584.pdf
    • http://files.ivfround.com/uploads/1/3/1/3/131382700/xipano_jiferirufelisej_jutoxagekipa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/tobapuwujugesalexapof.pdf
    • https://cdn.shopify.com/s/files/1/0432/1948/4839/files/26232664410.pdf
    • https://cdn.shopify.com/s/files/1/0429/2247/5687/files/53983627956.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jufozigazagapuji.pdf
    • https://cdn.shopify.com/s/files/1/0434/2985/5393/files/bavaner.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1863/files/jiximinuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/2878/1988/files/discord_names_ideas.pdf
    • https://cdn.shopify.com/s/files/1/0430/4125/9671/files/bonsai_tree_care_instructions_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0431/6646/6216/files/4609342435.pdf
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/23933707413.pdf
    • https://cdn.shopify.com/s/files/1/0438/9994/5112/files/antenna_theory_analysis_and_design_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/3113/4365/files/14519620181.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_off00008599.bin
d767e5c7c0dbe100d01360f7dfe9986e00da7b6d86398403dc83bb00783e3f21
pdf-font-stream PDF embedded font (sfnt) at offset 0x8599 5164 bytes
font_01_sfnt_off00009744.bin
ca84f6def6d206202b756ab52bcc9b7ac4566fbac939abab3ae53715bbd2b7d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9744 10916 bytes