Malicious PDF — malware analysis report

Static analysis result for SHA-256 894882c16c5baa2b…

MALICIOUS

PDF

40.9 KB Created: 2020-08-27 20:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afa970481e1b326750a8b0359a71bf6a SHA-1: 89dc15de83bbf77e98bfd9b1e237054f62cde2e6 SHA-256: 894882c16c5baa2be487ba3d9b97cc420e31c736a07cdc6bd5c1c7121fffd377
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.com/pify?keyword=5e+goblin+shaman, is identified as a known malicious redirector. This suggests the document is designed to lure users to malicious sites, likely for further exploitation or phishing. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=5e+goblin+shaman
    • http://kotubod.montereychoir.com/uploads/1/3/0/8/130873995/kogosalij.pdf
    • http://files.niebna.org/uploads/1/3/0/8/130874108/ee47ba13349a7.pdf
    • http://files.burningswordsmenstudio.com/uploads/1/3/2/8/132814342/8344aecca3.pdf
    • http://files.schombergcommunityfarm.ca/uploads/1/3/1/3/131380868/c3c31a37f78ec7.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/zegotalozepizemem.pdf
    • https://cdn.shopify.com/s/files/1/0428/0736/1703/files/79504803261.pdf
    • https://cdn.shopify.com/s/files/1/0463/0708/2402/files/12826050363.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/saturated_steam_pressure_table.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0714/files/timer_14_minutes.pdf
    • https://cdn.shopify.com/s/files/1/0440/3301/5958/files/tempstar_furnace_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9619/3686/files/47411769197.pdf
    • https://cdn.shopify.com/s/files/1/0429/3502/5831/files/90916712427.pdf
    • https://cdn.shopify.com/s/files/1/0437/5884/6109/files/nissan_50_forklift_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/diabetes_insipidus_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/kuxapamazunolazerizimup.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_off00006241.bin
d6114e6ae49afc864e29fd50f13486c38b88d1b7bf34f485add1b1cf4e530bfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6241 5172 bytes
font_01_sfnt_off000073b9.bin
9957f474d38bf200fb4e6604fa1153bc64e237a1a678350533835758def7197c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B9 10460 bytes

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