PDF malware analysis — malicious · 9745454cd007fafd

MALICIOUS

PDF

41.9 KB Created: 2020-09-01 11:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 32f22c406187fb66ea889ca516d49318 SHA-1: 6478e2b4584ea946e1620ce470f434801d083147 SHA-256: 9745454cd007fafdc36ea59656d6202e4f2fa558ca86201ab3bdc8eceaf13e7c

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by an ML classifier and contains numerous embedded links. One of these links, 'https://ttraff.ru/wix?keyword=breville+barista+express+espresso+maker+manual', is identified as a malicious redirector. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through seemingly benign documents.

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/wix?keyword=breville+barista+express+espresso+maker+manual
- https://static.usrfiles.com/ugd/868401_70713d1de6e54a918fbb6d279f846303.pdf
- https://static.usrfiles.com/ugd/e5412a_bb6fc4a2fc5041f4be26389c21dfd72a.pdf
- https://static.usrfiles.com/ugd/0d002d_a7f36e9f28b5444493ff38ed40da8d1b.pdf
- https://static.usrfiles.com/ugd/b8c837_64f0dd99f05a4b548b776fd9b4b409ed.pdf
- https://static.usrfiles.com/ugd/d9d1f5_b573bfc27a7f4402b573db497e908d5f.pdf
- https://cdn.shopify.com/s/files/1/0431/0876/1764/files/29508119601.pdf
- https://cdn.shopify.com/s/files/1/0434/8172/7129/files/34764331481.pdf
- https://cdn.shopify.com/s/files/1/0429/6710/5687/files/determination_of_casein_in_milk.pdf
- https://cdn.shopify.com/s/files/1/0434/9453/9429/files/3678237744.pdf
- https://cdn.shopify.com/s/files/1/0438/4092/9957/files/pdf_split_and_merge_mac.pdf
- https://cdn.shopify.com/s/files/1/0431/5139/2922/files/sujirudesirovadewobe.pdf
- https://cdn.shopify.com/s/files/1/0430/0954/0257/files/xezik.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_off00006670.bin` `e379c6154bd9f02b33d40dc9d39a60ec6846cb96a9d99a8920d586d18fe291bf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6670	5348 bytes
`font_01_sfnt_off0000788e.bin` `c54d5f6647ef74573fa2bf850e66332a717037f87306acb93a7062eba83a2415`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x788E	10104 bytes

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