PDF malware analysis — malicious · 31cc36e2edf28ae1

MALICIOUS

PDF

40.8 KB Created: 2020-08-22 11:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c7cb15eb03292173e9a28de573eda456 SHA-1: ac476dbd44d2ae2766fd70b1c06b991f49e1c968 SHA-256: 31cc36e2edf28ae16a056989df9c74ec25773dfc36bf51cb69903f116a82ec1e

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=assessment+form+for+pediatric+physiotherapy'. This heuristic, combined with the ML classifier flagging the PDF as malicious, strongly suggests an attempt to redirect users to a harmful site. The document body, though heavily obfuscated, contains the same suspicious URL, reinforcing the attack pattern.

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=assessment+form+for+pediatric+physiotherapy
- http://files.parkwayspa.com/uploads/1/3/0/9/130969001/8314476.pdf
- https://cdn.shopify.com/s/files/1/0432/6277/1366/files/14331956643.pdf
- https://cdn.shopify.com/s/files/1/0432/8642/9861/files/2105980075.pdf
- https://cdn.shopify.com/s/files/1/0433/2473/5643/files/pemizazivuzolidufadilalo.pdf
- https://cdn.shopify.com/s/files/1/0428/0962/2695/files/test_de_zung_ansiedad_y_depresion.pdf
- https://cdn.shopify.com/s/files/1/0437/2047/4779/files/xurejeniwaji.pdf
- https://cdn.shopify.com/s/files/1/0433/6871/0300/files/vepazel.pdf
- https://cdn.shopify.com/s/files/1/0431/0204/4316/files/asphalt_8_airborne_hack_unlimited_money.pdf
- https://cdn.shopify.com/s/files/1/0430/8549/6482/files/30795486862.pdf
- https://cdn.shopify.com/s/files/1/0434/6196/8025/files/70449003671.pdf
- https://cdn.shopify.com/s/files/1/0432/5598/8387/files/wajulakomokerizizipu.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/
- https://cdn.shopify.com/s/files/1/04

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006196.bin` `ad10dc2b6fde4bae91df2c29f0719ae5691c8072592dd76e7913c94959607b46`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6196	5456 bytes
`font_01_sfnt_off000073f8.bin` `a07abd70f6b67fdd512b7380e973e9a49135d75c95b132788ac5fae4104b6f87`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x73F8	10040 bytes

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