PDF malware analysis — malicious · 24a726add4893235

MALICIOUS

PDF

54.3 KB Created: 2020-08-19 22:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0a05707b15d0081bb3b7e685622f0fb7 SHA-1: 51f672b3ae5367371a410016e0303e410099ed2c SHA-256: 24a726add4893235d5df98bd17702923f339fda2655f3b2321a5c4809e791de3

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain, ttraff.ru. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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=guardians+of+the+galaxy+2+soundtrack
- http://files.mathessentials1.net/uploads/1/3/1/8/131860787/mozodamakemi.pdf
- http://files.dariodidonato.com/uploads/1/3/2/8/132814146/7bee8500.pdf
- https://cdn.shopify.com/s/files/1/0431/0679/5686/files/63847191974.pdf
- https://cdn.shopify.com/s/files/1/0428/6971/9196/files/74417710393.pdf
- https://cdn.shopify.com/s/files/1/0448/4582/6210/files/domabulujufevutesuwazunap.pdf
- https://cdn.shopify.com/s/files/1/0432/2122/1539/files/baka_to_test_light_novel.pdf
- https://cdn.shopify.com/s/files/1/0431/3514/0007/files/ruvogetisidigi.pdf
- https://cdn.shopify.com/s/files/1/0432/1175/1588/files/isometric_view_drawing_practice.pdf
- https://cdn.shopify.com/s/files/1/0433/4845/9675/files/fumaf.pdf
- https://cdn.shopify.com/s/files/1/0447/9506/8567/files/portland_cement_production.pdf
- https://cdn.shopify.com/s/files/1/0435/5473/4241/files/introduction_to_mineralogy_nesse_free_download.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000086cf.bin` `bcba5b4fb1e6886b5cda9746103584c84acf32acb571c84ce387f0cb79365df8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86CF	5564 bytes
`font_01_sfnt_off000099cd.bin` `d74231301ff48f3c67cb9566de0ac6223f7cf264834f9053142350891e7e18e6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x99CD	10584 bytes
`font_02_sfnt_off0000be00.bin` `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBE00	4324 bytes

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