Malicious PDF — malware analysis report

Static analysis result for SHA-256 707f0e8d53f76573…

MALICIOUS

PDF

50.6 KB Created: 2020-07-31 15:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 472881ed1b966c83ba8019a01ae7ca91 SHA-1: 49e5e6557b1dd8de6b668553bc90e6a3b477f68d SHA-256: 707f0e8d53f765733fcfe073198a9022738e10d86ccc63e1bcfb616a3ac5348c
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, appears to be a lure related to a business plan. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms the intent to lead users to harmful 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=bread+bakery+business+plan+in+south+africa+pdf
    • http://files.brennafitzgerald.com/uploads/1/3/0/8/130874639/vimewupopab_gujowelepalamux.pdf
    • http://files.mrmulholland.com/uploads/1/3/0/7/130740017/b098f4a655f0.pdf
    • http://files.diosamedicalesthetics.ca/uploads/1/3/0/8/130813778/b332e3251c1.pdf
    • http://files.dominionarchery.com/uploads/1/3/0/8/130813778/0a5de6a.pdf
    • http://files.alteanunez.net/uploads/1/3/1/4/131453982/jizemakobeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5215/4532/files/45442076099.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51439980706.pdf
    • https://cdn.shopify.com/s/files/1/0432/0627/9323/files/19872197012.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72163988246.pdf
    • https://cdn.shopify.com/s/files/1/0437/2270/2999/files/58715275588.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/38183062224.pdf
    • https://cdn.shopify.com/s/files/1/0440/4209/2694/files/84016360267.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/pumidepagebasiwejibufota.pdf
    • https://cdn.shopify.com/s/files/1/0428/1057/2967/files/7970233978.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_off00008689.bin
80be782c348c603af194e52065f94fa767844b7c5e1252c1a443042096c09f97
pdf-font-stream PDF embedded font (sfnt) at offset 0x8689 5480 bytes
font_01_sfnt_off00009920.bin
e4c7495b08fa1e1a6fffd9271697bd9c4adb35c7d3e681334b32bec9d433f6e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x9920 10580 bytes