PDF malware analysis — malicious · 73b8bc4244a37844

MALICIOUS

PDF

37.1 KB Created: 2020-08-28 00:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 915d903076d989786db47e8fe586a644 SHA-1: d79d82e4f8a5ff9a0042854e78b36cb281d77e79 SHA-256: 73b8bc4244a37844b1a5245d632459682051399204ec1819fc59079b3e29202d

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to gaming and a URL that aligns with the malicious redirector. This suggests an attempt to direct users to malicious sites, potentially for phishing or malware distribution.

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=gamerz+gaming+website+gta+5
- http://gijolos.createhealingreiki.com/uploads/1/3/0/7/130738714/fegixaboposojawasat.pdf
- http://fulowal.creedmoorumc.org/uploads/1/3/1/4/131455463/fb08a6e13bbbc.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0433/1329/9620/files/70834703651.pdf
- https://cdn.shopify.com/s/files/1/0432/8731/4585/files/dawovujomadadubume.pdf
- https://cdn.shopify.com/s/files/1/0430/6642/5497/files/fujixazopotu.pdf
- https://cdn.shopify.com/s/files/1/0438/6524/3803/files/vurevurimipibakaz.pdf
- https://cdn.shopify.com/s/files/1/0433/1647/8110/files/15829852761.pdf
- https://cdn.shopify.com/s/files/1/0463/4650/2306/files/detadol.pdf
- https://cdn.shopify.com/s/files/1/0461/5405/5843/files/23818070581.pdf
- https://cdn.shopify.com/s/files/1/0434/6108/3301/files/teserumotinanu.pdf
- https://cdn.shopify.com/s/files/1/0431/5453/8658/files/71643669656.pdf
- https://cdn.shopify.com/s/files/1/0431/3923/5997/files/dialogue_anglais_et_franais.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000053b5.bin` `49d97758880c1a9021c3bfb8aeeed13b0221cd7d8e8aa569e9bcf278c7ead43c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x53B5	5408 bytes
`font_01_sfnt_off0000662b.bin` `29aedeac44e1c9d5c7c98d88f1a6eb5a95d9762e79124cef8205fab129312413`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x662B	9928 bytes

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