Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9b32045091cb8c…

MALICIOUS

PDF

41.5 KB Created: 2020-11-08 07:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e20b617198ab681f83602b8c68b78ca SHA-1: 98819899db1bc6351b56db9739adb5bfe0cfd681 SHA-256: ed9b32045091cb8c44d7f3437e25df5a2362f2254c4b32db46bc17936a4147b1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many of which are to PDF files hosted on various platforms. The primary malicious URL, https://traffset.ru/123?keyword=shakra+keto+diet+ingredients, is likely used to redirect the user to a phishing or malware distribution site. The document's content, though heavily obfuscated, appears to be a lure related to 'keto diet ingredients'. No scripts were extracted, but the PDF structure itself facilitates the link farm attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=shakra+keto+diet+ingredients
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.pdf
    • https://cdn-cms.f-static.net/uploads/4407988/normal_5f92907f66491.pdf
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/04ccc8ea42.pdf
    • https://zexenokupilifuw.weebly.com/uploads/1/3/4/3/134375928/72754001.pdf
    • https://depufavekozumel.weebly.com/uploads/1/3/4/0/134017714/2962129.pdf
    • https://rukazoxet.weebly.com/uploads/1/3/4/0/134040508/mamavaxuzesat_kiserojigipetix_dilufesokafoti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3ede1104-94b7-4985-b9a9-96bb1ae83631/general_mobile_discovery_driver_indi.pdf
    • https://s3.amazonaws.com/felasorarabipis/94701795661.pdf
    • https://uploads.strikinglycdn.com/files/c23f6c3a-810c-41b2-b299-bc5a699a75cc/844997736.pdf
    • https://uploads.strikinglycdn.com/files/132da228-07f4-4279-b170-1aa1a5d66d66/love_and_basketball_full_movie_onlin.pdf
    • https://uploads.strikinglycdn.com/files/62986393-a957-4e21-8b28-47048ba8cc9b/sixukoroxagerakofonowoven.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006591.bin
81d79f89e98195ed99fc91fb530c875b5e1e651dab91b7112a6436c6080fdcb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6591 5220 bytes
font_01_sfnt_off0000774b.bin
92038549cb0fe9e8e879d0a0bceccbda54af2037d6873bc5c6b8170879d7c089
pdf-font-stream PDF embedded font (sfnt) at offset 0x774B 10148 bytes