PDF malware analysis — malicious · 8346dbead0af4ee2

MALICIOUS

PDF

45.4 KB Created: 2020-08-22 20:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c6e1ba52f1162fa189a8788ac2b0e7d2 SHA-1: 23e2b6bd3e65c721c2fb65752301081d39c70887 SHA-256: 8346dbead0af4ee27690736865c0ececa8b6fe0e49a0cac0dad5b6eecd91637a

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The document body contains obfuscated text and a URL that appears to be a lure for a job offer. The primary malicious URL, https://ttraff.ru/pify?keyword=absage+angebot+positiv+formulieren, is likely used to redirect users to a malicious site. The presence of numerous links, many hosted on Shopify, suggests an attempt to create a link farm for SEO poisoning or to distribute payloads.

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.ru/pify?keyword=absage+angebot+positiv+formulieren
- http://zegadejot.nathannasbymusic.com/uploads/1/3/0/9/130969408/30359062b.pdf
- http://files.deadmandiscs.com/uploads/1/3/1/6/131606261/6900bf8e.pdf
- http://files.divingtokyo.com/uploads/1/3/2/6/132681080/butixopiperad.pdf
- https://cdn.shopify.com/s/files/1/0433/3859/6511/files/tuzijajobunurif.pdf
- https://cdn.shopify.com/s/files/1/0428/5346/6271/files/98563510203.pdf
- https://cdn.shopify.com/s/files/1/0440/7567/9896/files/decimal_place_value_through_thousandths_worksheets.pdf
- https://cdn.shopify.com/s/files/1/0436/2108/9444/files/fofarov.pdf
- https://cdn.shopify.com/s/files/1/0431/3910/4917/files/86925073873.pdf
- https://cdn.shopify.com/s/files/1/0449/2269/9943/files/muxuwogog.pdf
- https://cdn.shopify.com/s/files/1/0461/7096/4131/files/congruent_triangles_snowflake_activity_answer_sheet.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_off0000726a.bin` `9f672d6c53494ce026c55c68199cb7f8e635cc6d837b49953dd345dc2f245480`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x726A	5412 bytes
`font_01_sfnt_off000084bd.bin` `fe2015bc94fc27ebceea1a647a7ae6a3e9f4eb100d21cf7227ee1d7e501a2b82`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84BD	11060 bytes

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