PDF malware analysis — malicious · 26bbd141f0c5c24c

MALICIOUS

PDF

40.7 KB Created: 2020-08-20 13:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 15389a7f74373cd34741c4c80a18472b SHA-1: 0f14cad22487a7c7c092103423738e4dea197c58 SHA-256: 26bbd141f0c5c24c1561e6c0a698fd8bd59c7eb2e1f1e91b0d0eb707d503a51c

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The document body contains a URL that points to a known malicious redirector, which is likely used to distribute further malicious content. The presence of numerous external links, many hosted on Shopify, suggests an attempt to obscure the final malicious destination.

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.cc/pify?keyword=kung+fu+big+league+full+movie
- http://lufow.kidacademy.org/uploads/1/3/2/8/132814930/9108716.pdf
- http://refajilo.houseofgeekiness.com/uploads/1/3/2/3/132303382/963fa.pdf
- https://cdn.shopify.com/s/files/1/0439/1262/6344/files/77414721939.pdf
- https://cdn.shopify.com/s/files/1/0431/8514/3965/files/chapter_1_ccna.pdf
- https://cdn.shopify.com/s/files/1/0428/2135/3639/files/dikasifuregazumi.pdf
- https://cdn.shopify.com/s/files/1/0431/8131/0114/files/51580206112.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
- https://cdn.shopify.com/s/files/1/0447/1295/1961/files/que_es_dieta_astringente.pdf
- https://cdn.shopify.com/s/files/1/0429/6700/7386/files/16246192913.pdf
- https://cdn.shopify.com/s/files/1/0434/9375/2997/files/5314933368.pdf
- https://cdn.shopify.com/s/files/1/0432/1430/7496/files/sanijukipadaponulurutawem.pdf
- https://cdn.shopify.com/s/files/1/0429/9807/1449/files/13770128324.pdf
- https://cdn.shopify.com/s/files/1/0427/7354/5116/files/74596626579.pdf
- https://cdn.shopify.com/s/files/1/0432/6585/1542/files/zuvebojatokejazimax.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_off000060f6.bin` `e82d429d75afebab63e9cac12a756e93270cfa9db511a3d2f9d82c4fa4c544e9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60F6	4980 bytes
`font_01_sfnt_off000071ef.bin` `9fec9ef4ce1e5600b9a2ad40d85e78b77a3503c509c673cea1e2b8eb8df545fe`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71EF	10608 bytes

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