Malicious PDF — malware analysis report

Static analysis result for SHA-256 f736772af69fc836…

MALICIOUS

PDF

43.5 KB Created: 2020-08-30 00:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f48f758a0f4370dd5ee49a8b21f59d4c SHA-1: fbafb71ce22ca4d14f3ef45267fde9c73f90b62a SHA-256: f736772af69fc83604687b9c2dd6aaadcfc365a4fdc97f6404714773a3da736e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with one prominent link redirecting to the known malicious domain 'ttraff.com'. The majority of other links point to a link farm hosted on Shopify, suggesting a coordinated effort to distribute malicious content. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=build+tabletop+arcade
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/61519400195.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/84431298987.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/19589350552.pdf
    • https://cdn.shopify.com/s/files/1/0441/2493/0200/files/81868032079.pdf
    • https://cdn.shopify.com/s/files/1/0460/3435/4340/files/pathfinder_ancient_red_dragon.pdf
    • https://cdn.shopify.com/s/files/1/0464/7436/3048/files/jobaziwosutapamutanodonu.pdf
    • https://cdn.shopify.com/s/files/1/0444/3347/3703/files/orthodox_christian_theology.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/lemulosis.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6931/files/lusuraxezidaramixoto.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/bawebidizubugosadegova.pdf
    • https://cdn.shopify.com/s/files/1/0432/8371/0117/files/76834761955.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/prisioneiros_da_mente_augusto_cury_download.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_fc17db435ede4f47b651d3f260971cfc.pdf
    • https://static.usrfiles.com/ugd/0dd040_f617421a77fc480ba1bfea098c21b555.pdf
    • https://static.usrfiles.com/ugd/b8c837_6bde1bf4d48645b9821b20ead62ea58b.pdf
    • https://static.usrfiles.com/ugd/07ef24_48fb38a9115f47e081b0643eebd038fe.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_off00006d32.bin
f01d2fd00eb003f2cd6d841a760de1d0fa05376e4580be8d28372bb4cf5d2fd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D32 5076 bytes
font_01_sfnt_off00007e72.bin
1ec4a95e7b975357417201bd86b97ff24771d923ea4a3ea2d46c5bfe4d7a705d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E72 10196 bytes