PDF malware analysis — malicious · 89df5f40716382ae

MALICIOUS

PDF

100.3 KB Created: 2020-12-28 01:03:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: c91aa01ff5cd9953310353a4f19ed736 SHA-1: cbff088bfe3644458108fbc0fdff584e2457d8e2 SHA-256: 89df5f40716382aebeed1d0817fe8a8ca2776214afb97520ab4beb33089ee747

222 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://gettraff.ru/123?utm_term=torrance+unified+school+district+pay+scale'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, one of which points to 'https://s3.amazonaws.com/jepavilutabilel/the_cube_streaming_movie.pdf'. The presence of a fake invoice lure heuristic suggests a phishing or scamming intent. The ML classifier strongly flags this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://gettraff.ru/123?utm_term=torrance+unified+school+district+pay+scale In PDF document text
- https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/e5bcd2697.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379471/normal_5f8f9ebed082c.pdfIn PDF document text
- https://cdn.sqhk.co/kopizikob/Dgdmha9/demon_soul_collector_ps5.pdfIn PDF document text
- https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/5718860.pdfIn PDF document text
- https://cdn.sqhk.co/gemadaruvow/giJ3Mkt/95486762057.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://s3.amazonaws.com/jepavilutabilel/the_cube_streaming_movie.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ee988c3c-fcb2-4f7a-b7f0-65d5d2777a0f/81087309118.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4339a3e8-00c4-4c66-af8e-4a40384e1719/venazaduri.pdfIn PDF document text
- https://s3.amazonaws.com/ropuba/rumajoja.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c54d3c0b-b015-4989-a348-9bc8032490f7/canterbury_tales_test_questions_and_answers.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2f670910-291e-4927-9bac-2cc4361bfa3d/a.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0ecaf634-d616-426f-bc89-684a66b479d6/thomas_calculus_early_transcendentals_12th_edition.pdfIn PDF document text
- https://s3.amazonaws.com/pusixa/fundamentals_of_molecular_spectroscopy_banwell_ebook.pdfIn PDF document text
- https://s3.amazonaws.com/lanubili/implant_direct_guided_surgery_sleeves.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4b0e2c5a-c142-443d-aa6c-b6071d4febe6/nifuded.pdfIn PDF document text
- https://s3.amazonaws.com/levumoduf/tivosig.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000123b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123B5	5176 bytes
SHA-256: `7431b23abb8f064fa3c7a3148fd9a416e2ae0c29d1d8684cc6336073e0aad3f5`
`font_01_sfnt_off00013545.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13545	11128 bytes
SHA-256: `f1cbca4ab22611a3b447eebc2ae5bbc6e7191deccdc320aab8fc5b5f2e731092`
`font_02_sfnt_off00015b50.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15B50	17456 bytes
SHA-256: `5b812b0d81935bc0496a558206065105dd61b52b773a699019069a6c5d324de6`
`font_03_sfnt_off00017500.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17500	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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