PDF malware analysis — malicious · b8db7cecaf93fa86

MALICIOUS

PDF

38.7 KB Created: 2020-08-23 01:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3482fa2db53463dd9bd7de501b37d4d3 SHA-1: af786a2b8f60ba07e8cfa4fdf6208256c74511b5 SHA-256: b8db7cecaf93fa86be3d11d558b8b500a6d19655eaf0e759184a663e72f0e6b3

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to obscure the ultimate destination. The document body, though partially corrupted, contains the URL and a keyword suggesting a lure for users interested in game saves. The ML classifier strongly indicates maliciousness.

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=assassin%2527+s+creed+origins+save+game
- http://juxefab.caringheartsandvoices.org/uploads/1/3/0/7/130738837/1165693.pdf
- http://woxox.katyflowershop.com/uploads/1/3/0/7/130776445/2122592.pdf
- http://files.cliocareer.nl/uploads/1/3/2/6/132696063/rupopit-dizopaf.pdf
- https://cdn.shopify.com/s/files/1/0430/3526/3130/files/depuwegesipawa.pdf
- https://cdn.shopify.com/s/files/1/0433/0923/6374/files/mumaxasitolubekokus.pdf
- https://cdn.shopify.com/s/files/1/0437/7952/2714/files/3660310987.pdf
- https://cdn.shopify.com/s/files/1/0433/7208/5406/files/pedomo.pdf
- https://cdn.shopify.com/s/files/1/0430/8933/0330/files/vapuvixokuwemidejajos.pdf
- https://cdn.shopify.com/s/files/1/0434/3008/4760/files/tubixexe.pdf
- https://cdn.shopify.com/s/files/1/0430/2582/5955/files/63224982252.pdf
- https://cdn.shopify.com/s/files/1/0430/3945/7431/files/18484481662.pdf
- https://cdn.shopify.com/s/files/1/0433/2044/3045/files/12587417927.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_off00005784.bin` `447fd5da21b1d7fe119cd8ccf6220087d3f33f59c1a20fcc42f218f49a3ace59`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5784	5308 bytes
`font_01_sfnt_off0000697c.bin` `2da76578df6cbd8332874583c1172a2adb973b37083cb54f3af544076660e4f5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x697C	11060 bytes

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