Malicious PDF — malware analysis report

Static analysis result for SHA-256 6520120a2290cf30…

MALICIOUS

PDF

38.7 KB Created: 2020-10-31 20:02:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cef108120bd4c54670f2f04d09a36d3 SHA-1: 1816f31c9f3cff259ef5dc5dbf4a404b40feb374 SHA-256: 6520120a2290cf30ac82e352a3de52a2c014b8f3d0d3a146d1083b610f744d08
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm or redirection scheme. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest a malicious intent to redirect users to potentially harmful content.

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://ggtraff.ru/aws?keyword=geo+trax+grand+central+station
    • https://rimosuvifakub.weebly.com/uploads/1/3/4/3/134310068/ede1030.pdf
    • https://virataxutepubom.weebly.com/uploads/1/3/0/8/130874282/zurijumokejo.pdf
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/piramonokuzujov.pdf
    • https://wevinavuligi.weebly.com/uploads/1/3/4/5/134505150/6585845.pdf
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/bumumobo.pdf
    • https://cdn-cms.f-static.net/uploads/4425768/normal_5f9c9de51390a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/xewudowuzube.pdf
    • https://cdn.shopify.com/s/files/1/0500/2779/0496/files/5273674122.pdf
    • https://uploads.strikinglycdn.com/files/964926ad-95f8-4b28-9e88-36ab9cd58594/ffxiv_moogle_beast_tribe_unlock.pdf
    • https://cdn.shopify.com/s/files/1/0486/3734/5950/files/sagekomimuvujinolin.pdf
    • https://uploads.strikinglycdn.com/files/ceb02f31-8de9-4dd3-8036-4a39252b65f1/kiletasilufij.pdf
    • https://cdn.shopify.com/s/files/1/0504/3136/1213/files/religiniwe.pdf
    • https://uploads.strikinglycdn.com/files/74e1b18e-4fce-4fc2-8e68-d215a939a445/35935560989.pdf
    • https://uploads.strikinglycdn.com/files/ee5182a7-c750-4718-a00d-677e0eb33ed9/80170991758.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_off00005960.bin
817a3bf6a12fa0a981259aeb07fa71eac3d8cb6f85d4e68ba283c2d30fda96f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5960 5208 bytes
font_01_sfnt_off00006b25.bin
c7dc3eddc5f7d941e6aae6782dc667281f5c5332164826f980fbae1f6680128f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B25 10164 bytes