PDF malware analysis — malicious · 2626abbc5e6fe1b7

MALICIOUS

PDF

45.9 KB Created: 2020-08-23 20:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0d204e965feb6d7e5879e0a094f6126f SHA-1: 537284d6d8fa0c00a13ff534751eb5b2c294a172 SHA-256: 2626abbc5e6fe1b7c65879c7b7c777818877e548ad0e3074fb5cf7d2b5f23ff9

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one identified as a known malicious redirector (ttraff.com). The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=parts+of+speech+worksheets+6th+grade', indicating a likely attempt to lure users to malicious infrastructure. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to distribute malicious 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://ttraff.com/pify?keyword=parts+of+speech+worksheets+6th+grade
- http://files.risingravenband.com/uploads/1/3/1/3/131384018/buvab.pdf
- http://files.peydenshelton.com/uploads/1/3/0/8/130814680/696d46.pdf
- http://files.inspiredbybaking.com/uploads/1/3/1/3/131380456/3651950.pdf
- http://files.msfirephotography.com/uploads/1/3/0/8/130874676/7662538.pdf
- http://rozuvopid.ucruv.com/uploads/1/3/0/9/130969596/2835452.pdf
- https://cdn.shopify.com/s/files/1/0428/5467/8687/files/ejercicios_resueltos_de_angulos_en_la_circunferencia.pdf
- https://cdn.shopify.com/s/files/1/0430/1645/4305/files/97170517335.pdf
- https://cdn.shopify.com/s/files/1/0433/8047/4014/files/86342495977.pdf
- https://cdn.shopify.com/s/files/1/0438/1107/8301/files/85992361606.pdf
- https://cdn.shopify.com/s/files/1/0432/6014/9910/files/16074490493.pdf
- https://cdn.shopify.com/s/files/1/0430/2667/7913/files/graphic_design_portfolio_psd_template.pdf
- https://cdn.shopify.com/s/files/1/0437/6556/3549/files/livitejexeramu.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000742a.bin` `7f9e52bb49133181ef2ef20d59b303f0dadd582203ab50be4f4b434c6e8e97ef`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x742A	5696 bytes
`font_01_sfnt_off000087a3.bin` `9fa236673de5340c01af692afc7f564ccdc408dc9ddad9292ce4aa73a665d3fd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x87A3	10288 bytes

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