PDF malware analysis — malicious · da9c911f0e5699d1

MALICIOUS

PDF

40.7 KB Created: 2020-08-12 15:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d21c2ac3ae3558c664e375e4a1ce7d9f SHA-1: cfc0f90ad404336d12f899a4d53be8fc13c11c86 SHA-256: da9c911f0e5699d11cd5fa491e11779fad1a7de4fb343b1929e78b7a8f39129a

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1200 Hardware Addends T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is `https://ttraff.com/wb?keyword=comparing%20sexual%20and%20asexual%20reproduction%20pdf`, which is likely used to funnel users to further malicious content. The ML classifier also strongly indicated 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/wb?keyword=comparing%20sexual%20and%20asexual%20reproduction%20pdf
- http://files.revolutionuganda.org/uploads/1/3/1/0/131070712/65e23e262.pdf
- http://files.frontporchimports.com/uploads/1/3/2/6/132695387/mizuxukiwimipor.pdf
- http://files.oakgroveunitedmethodist.com/uploads/1/3/1/1/131163836/2510940.pdf
- https://cdn.shopify.com/s/files/1/0433/9902/0696/files/823451237.pdf
- https://cdn.shopify.com/s/files/1/0432/9072/2472/files/gexozovoxapezuvoboxin.pdf
- https://cdn.shopify.com/s/files/1/0427/9438/5575/files/honda_gcv160_pressure_washer.pdf
- https://cdn.shopify.com/s/files/1/0431/3861/3415/files/66638566297.pdf
- https://cdn.shopify.com/s/files/1/0434/0016/7589/files/risk_factor_definition.pdf
- https://cdn.shopify.com/s/files/1/0431/4100/5480/files/69618768633.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62654677968.pdf
- https://cdn.shopify.com/s/files/1/0437/9734/8514/files/85532510550.pdf
- https://cdn.shopify.com/s/files/1/0433/4728/0026/files/nemanokimasanomigojim.pdf
- https://cdn.shopify.com/s/files/1/0427/8432/5798/files/86841340222.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_off00005d31.bin` `4d27fad55835b6705ebca5270348899d889eced4333ddd2b3c61500b33b97d17`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D31	5448 bytes
`font_01_sfnt_off00006fa4.bin` `98724f908ace134527b9eafb1ea83bc3f49390530b0ee4d52bf6bbcb0ce8a0cc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FA4	11268 bytes

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