Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ce4d22c67411db…

MALICIOUS

PDF

39.5 KB Created: 2020-09-19 16:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0687b01d408b5a5fb5602c59c447736 SHA-1: 5dc9d82dfb7221e83c87695787cb622b6f045d82 SHA-256: 20ce4d22c67411dbb8361dcfa2b94f27c11c48c0ea40a5d909ea7d116610ce72
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL related to 'ark survival evolved ps4 server settings'. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains references to the same lure and URLs, reinforcing the attack pattern. The primary malicious IOC is the redirector URL used in the lure.

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.club/wix?keyword=ark+survival+evolved+ps4+server+settings+guide
    • http://nipexuxi.greatlongstonepreschool.org.uk/uploads/1/3/0/8/130874671/858ddd97ae3601.pdf
    • http://dotepas.alirasoulfilms.com/uploads/1/3/0/7/130739347/kupejexugiweke-nigalobawo.pdf
    • http://duren.revivereplenish.square.site/uploads/1/3/0/7/130775531/kakada.pdf
    • https://5f7409de-b72e-45d0-8e23-51f2f4c11b4a.filesusr.com/ugd/34e21e_91ac3ad5e0954ce3855b3c10cb018af3.pdf?index=true
    • https://c77a2d65-1f00-44cb-9e74-64209244e2d0.filesusr.com/ugd/76156b_515b86e9f8cc47a59c73b4a10050bad3.pdf?index=true
    • https://19484e04-4491-4216-aa68-d84e64f9af38.filesusr.com/ugd/b48b60_6b916117c0114ca99e6a56213ad77f49.pdf?index=true
    • https://b240de7a-c355-4419-921b-61e2a751a81c.filesusr.com/ugd/baef12_51a270bab75f4b749b5037d144c868dd.pdf?index=true
    • https://d196288d-379d-4a72-80e9-57fc1c06a43c.filesusr.com/ugd/912de2_9ec766be9da444ff8151856d4e51552a.pdf?index=true
    • https://ab8c2db3-5bd4-47fd-bc2b-8720b02551f9.filesusr.com/ugd/828753_208af014cfdd41e5a2977605fe90745f.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0438/9273/6155/files/81494807965.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/canonical_and_standard_form.pdf
    • https://cdn.shopify.com/s/files/1/0483/8735/8888/files/poruwiwomi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/muxezimumexanum.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_off00005b7f.bin
49f3e876745714c96b4321850d87db66a813f9e8147e1abafa17664fee3afd58
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7F 5328 bytes
font_01_sfnt_off00006dc0.bin
37c5d0120dc5e75be0dbddcc123db62d5caf279dd131096d309e4b883cbbc1e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC0 10372 bytes