PDF malware analysis — malicious · c63113ed526b2bcd

MALICIOUS

PDF

40.2 KB Created: 2020-08-17 16:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c7bd99516b9878b4ce0e05afa76afc94 SHA-1: 1ea67041dc90db3ca665a8e8873f2d55ccf33ee5 SHA-256: c63113ed526b2bcd121c6b2a226f2f3b8b4ce950bd5e7ce7728b91dffcf9a802

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and other Shopify links, suggesting a link farm or redirection scheme. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users through a seemingly legitimate document to a malicious site.

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=chemical+bonding+lecture+notes+pdf
- http://files.beaconchurchofchristgbctx.com/uploads/1/3/0/9/130970009/5637ab.pdf
- http://bunev.saud.solutions/uploads/1/3/1/0/131070750/futeduke.pdf
- https://cdn.shopify.com/s/files/1/0435/8779/7160/files/5740914984.pdf
- https://cdn.shopify.com/s/files/1/0431/0528/8352/files/jixonu.pdf
- https://cdn.shopify.com/s/files/1/0435/9074/6271/files/akbarnama_in_bengali.pdf
- https://cdn.shopify.com/s/files/1/0434/8297/2326/files/mebijud.pdf
- https://cdn.shopify.com/s/files/1/0431/9952/9121/files/wotipo.pdf
- https://cdn.shopify.com/s/files/1/0432/5670/9273/files/botines_plataforma_tacon_ancho.pdf
- https://cdn.shopify.com/s/files/1/0437/9430/1085/files/87373171671.pdf
- https://cdn.shopify.com/s/files/1/0431/7999/9383/files/34177786165.pdf
- https://cdn.shopify.com/s/files/1/0431/4618/2822/files/tugidizewejekepaxi.pdf
- https://cdn.shopify.com/s/files/1/0434/8385/7053/files/spring_boot_interview_questions.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_off00006023.bin` `a6d7c36f1fd555fd866807b6a1bf9daf7848977cb8d042cfd4b11d336bac1ba6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6023	5612 bytes
`font_01_sfnt_off00007301.bin` `ca2439a20ea31c31a35efd7302d10b264cd32c459b26a0b9cb76eb1b04dbd5f7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7301	9668 bytes

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