Malicious PDF — malware analysis report

Static analysis result for SHA-256 9accccce6d68a6bc…

MALICIOUS

PDF

46.3 KB Created: 2020-08-04 05:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97638693947410523197d497e3904ec4 SHA-1: f8126e0564112b9203dba5ed82feab1879312624 SHA-256: 9accccce6d68a6bcce38903361acf61b8ab39896166159480988ac9ff85e31f3
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a primary link to a redirector service (ttraff.cc) that is flagged as malicious. This redirector is presented as a free download for a 'genetic algorithm pdf', a common lure. The document body, though heavily obfuscated, contains the malicious URL and other Shopify URLs, some of which are part of a link farm. 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.cc/pify?keyword=genetic+algorithm+pdf+free+download
    • http://files.the-chateaux.com/uploads/1/3/1/4/131453989/zebobalagedibe_pejusojup_tujanovalofa.pdf
    • http://files.oldcemetery.org/uploads/1/3/1/4/131455956/miluvafujere.pdf
    • http://files.agileinspection.com/uploads/1/3/1/4/131437593/zemobinosa_levego.pdf
    • https://cdn.shopify.com/s/files/1/0437/7798/2626/files/cult_of_ignorance.pdf
    • https://cdn.shopify.com/s/files/1/0436/6653/8649/files/zixovowapulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66491839223.pdf
    • https://cdn.shopify.com/s/files/1/0433/9879/1322/files/12426132058.pdf
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/p90x_workout_calendars.pdf
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/lelibe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1379/9066/files/xexuwipevoxoxa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5151/files/nijaji.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/42156628876.pdf
    • https://cdn.shopify.com/s/files/1/0429/1733/1100/files/75001781908.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000697f.bin
779a4aa7c73e84bc105aa3d7ee7111ff2f41a89f65068878e4c1d44c4711f625		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697F 5300 bytes
font_01_sfnt_off00007b6a.bin
81b8cd7b3ceef98b6669089770aa302a74bc80c226ce0caa9b6ecef2acf3a1f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6A 10220 bytes
font_02_sfnt_off00009e40.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E40 4324 bytes

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