Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e35edc617d89a3f…

MALICIOUS

PDF

42.3 KB Created: 2020-08-22 02:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef76561f30b7ab0bdd043e4f8563e3f7 SHA-1: 7febb64601f5e35deb5f68d739268051eceb712d SHA-256: 2e35edc617d89a3f785cc880821dca9fa66989d88a18d5031f84c4ea1a21744c
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector infrastructure at `https://ttraff.com/pify?keyword=getz+pharma+annual+report+2016`. This suggests the document is designed to trick the user into visiting a malicious site under the guise of a pharma report. The presence of a large number of other PDF links also indicates a link farm, likely for SEO poisoning or to obscure the malicious destination.

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.com/pify?keyword=getz+pharma+annual+report+2016
    • http://golugimow.miweddingpainter.com/uploads/1/3/1/4/131453109/957643.pdf
    • http://files.huntsvilledecks.com/uploads/1/3/0/7/130776591/zazepejuwof_nexudozorudo_nulajapovagelom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdf
    • https://cdn.shopify.com/s/files/1/0435/8864/9123/files/demuforeposuropojila.pdf
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/67994608971.pdf
    • https://cdn.shopify.com/s/files/1/0431/7973/7237/files/rofomimita.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/naxagikelizid.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/75278306550.pdf
    • https://cdn.shopify.com/s/files/1/0463/3110/1345/files/lederujopilewesavetidupi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2843/files/kuregu.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_off0000675e.bin
6a00d12727da09529e7f32b5d7731b4ac265fd6aab22ff1cbc13a70d2a586b19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675E 5440 bytes
font_01_sfnt_off000079c5.bin
ef7b4608238261c5aa16377e6fda6b059d1fbd2ca0487e43fd97f4c1c050dd1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C5 10320 bytes

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