PDF malware analysis — malicious · ab3e54f93652c6c2

MALICIOUS

PDF

77.9 KB Created: 2020-11-03 09:11:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 09a539cd8dfc70eea99d5983782eb97c SHA-1: 5da284b8f7c9b580355a112665e135e44565a707 SHA-256: ab3e54f93652c6c2e87059684ae79b06e59185fa5da35e0ec2e2d4a10bbc7d83

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure, and is flagged by a machine learning classifier. The document body, though partially obfuscated, contains text related to cancelling an escrow account, suggesting a lure to trick users into clicking the malicious link. The presence of embedded links and the ML detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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.cc/123?keyword=sample+letter+to+cancel+escrow+account
- https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/mafitosodobabeme.pdf
- https://cdn-cms.f-static.net/uploads/4393506/normal_5f9256a849831.pdf
- https://fijuwokokaku.weebly.com/uploads/1/3/4/3/134382009/kigopebumatu.pdf
- https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/jibigamefomoni.pdf
- https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/xaxepeson.pdf
- https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/5132354.pdf
- https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/lazivof.pdf
- https://revokaraso.weebly.com/uploads/1/3/4/3/134320841/a39c9f2759f.pdf
- https://cdn-cms.f-static.net/uploads/4379487/normal_5f97c683a531a.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://uploads.strikinglycdn.com/files/214c9a0a-84aa-47df-90f1-6d6469a7502c/vexat.pdf
- https://uploads.strikinglycdn.com/files/1247224f-a4f2-47de-be22-32eda69db204/goraboxefajosezopud.pdf
- https://uploads.strikinglycdn.com/files/49feca9a-a6e5-4fcd-9207-2cace2dfe249/vacuum_tube_data_sheets.pdf
- https://cdn.shopify.com/s/files/1/0437/0743/3125/files/kesunudofupulexuni.pdf
- https://cdn.shopify.com/s/files/1/0480/1042/8575/files/47635052924.pdf
- https://uploads.strikinglycdn.com/files/94d9a14b-c253-4a10-a86f-b9a3da905509/28270169264.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://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
- http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_006_off0000eedb.bin` `cf272e94ec202fd2efd4eada42a680ec9f3d87b96135df0c6df5a9ca7955491e`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xEEDB	25128 bytes
`font_00_sfnt_off0000b899.bin` `2ea5f057d557333a4ba01c17f8682fa26ea785fea6853026f5df61d49e81a745`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB899	5108 bytes
`font_01_sfnt_off0000c9e7.bin` `c4bd6676bafe4b936003e16c731141902db1e116aa03d29ef913d2365d70aa6c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9E7	10708 bytes
`font_03_sfnt_off00011b6f.bin` `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B6F	4324 bytes

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