Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a6e24c31667a1b0…

MALICIOUS

PDF

45.2 KB Created: 2020-07-30 17:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9653e7e2563064e1a446c2ed324d674 SHA-1: d97702844f19f1a7faf65f1a077c5f34ecdb26f4 SHA-256: 2a6e24c31667a1b0017825a4afabc20c8f53a7cabc81334ae661fad378ce783d
152 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain metadata related to PDF generation, suggesting the content itself is a lure. The primary attack vector involves redirecting users to potentially harmful websites.

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=ansoff+product+market+growth+matrix+pdf
    • http://files.carnegieinvest.com/uploads/1/3/2/3/132303359/womes.pdf
    • http://files.mrjmusic.org/uploads/1/3/0/8/130814124/nifepevuseralilo.pdf
    • http://files.habitualspender.com/uploads/1/3/0/9/130969663/1147557.pdf
    • https://cdn.shopify.co
    • https://cdn.shopify.com/s/files/1/0434/9231/1206/files/20366514867.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7721/files/4385121029.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/likixatonebajakasanatu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8805/files/78385961420.pdf
    • https://cdn.shopify.com/s/files/1/0435/2986/3320/files/10120607813.pdf
    • https://cdn.shopify.com/s/files/1/0428/3249/4751/files/90583661338.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/xajijovesafirewoxerez.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/winuvipikizilotego.pdf
    • https://cdn.shopify.com/s/files/1/0438/5167/7856/files/sazabimijadisepeminerudu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/dojurawelimanutan.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2661/files/56403966153.pdf
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/5632679098.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_off0000717b.bin
06c34c2cd58cd5e0c214b9603f671fdb18fa25604f4024fbf4036375e568107d
pdf-font-stream PDF embedded font (sfnt) at offset 0x717B 5632 bytes
font_01_sfnt_off00008489.bin
04e0ed177bdd3027a786c0b26ed6d3dd29859445c485fd8cba8117632b1becf3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8489 10220 bytes