Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab173fb61353483f…

MALICIOUS

PDF

46.9 KB Created: 2020-08-11 13:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d140a8dde71b293de0652ec3038195f6 SHA-1: 6dec023d4b234fff28b5625772af667d42c4569c SHA-256: ab173fb61353483f0cf2f95019565bfe76bd77b996ed44ad625535ab6a1ac29f
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a document about 'golden rice genetic engineering'. It also functions as a link farm, directing users to numerous other PDFs hosted on Shopify. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector confirms a likely attempt to lead the user to a harmful destination.

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.ru/pify?keyword=golden+rice+genetic+engineering+process+pdf
    • http://files.wcclightingdesigns.com/uploads/1/3/0/9/130968992/biguvagatigobusima.pdf
    • http://files.thedynamicbody.org/uploads/1/3/0/7/130739951/gajojuvi.pdf
    • http://vamegazot.sondikakoaukera.com/uploads/1/3/1/1/131164211/pifumosaru.pdf
    • https://cdn.shopify.com/s/files/1/0433/3617/1679/files/29781905296.pdf
    • https://cdn.shopify.com/s/files/1/0447/5827/0101/files/public_holidays_in_karnataka_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/3010/2694/files/ketogenic_diet_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0434/8962/4224/files/15530962154.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4949/files/rizefalezekopusajixiwofoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2866/files/minecraft_mod_on_xbox_360.pdf
    • https://cdn.shopify.com/s/files/1/0437/9371/1261/files/kawizasivogefudojoxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/valenanewopa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4767/3253/files/68511571118.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/35524137478.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/active_vs_passive_voice_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9744/7831/files/54258997980.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/kexedinasugarukaloworim.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_off000079b8.bin
6f2ea0d6712fd5f26a4cfe2581408dd0da538dbaeda8c0caea417cf24d6c2865
pdf-font-stream PDF embedded font (sfnt) at offset 0x79B8 5144 bytes
font_01_sfnt_off00008b4f.bin
126a98079b0ad6933ab722fa208d8fc6d903dfd8f9a16e8a4fe3c69d349a3b0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4F 10312 bytes