PDF malware analysis — malicious · 61516adfec92f8f3

MALICIOUS

PDF

38.5 KB Created: 2020-09-03 06:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5367ecb47dacba144fee2553f13f8472 SHA-1: 8746c9133316ae4764ac7f27c58c6706084a9a8d SHA-256: 61516adfec92f8f332a932ffbd3ee65caba119612ed467132fdb27fa4084b970

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link disguised as a safety report template, aiming to trick users into clicking it. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links suggests a link farm or redirection scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or redirection attack.

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.club/wix?keyword=fda+ind+safety+report+template
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0428/7099/7151/files/zupubika.pdf
- https://cdn.shopify.com/s/files/1/0432/7063/5678/files/11779017330.pdf
- https://cdn.shopify.com/s/files/1/0433/6097/7048/files/58081888443.pdf
- https://cdn.shopify.com/s/files/1/0428/0962/2687/files/89046499419.pdf
- https://static.usrfiles.com/ugd/565485_683a8bba0da34e4c8b30f943183dee86.pdf
- https://static.usrfiles.com/ugd/b8c837_fa68f29a67f24bb393383657240e67a0.pdf
- https://static.usrfiles.com/ugd/122077_ca68fb482b164764982b50dfe53c9d79.pdf
- https://cdn.shopify.com/s/files/1/0430/3834/3322/files/bilaxanedenadoxemazeripe.pdf
- https://cdn.shopify.com/s/files/1/0427/7148/0742/files/adobe_indesign_software_free_full_version.pdf
- https://cdn.shopify.com/s/files/1/0433/6173/0718/files/trumpet_breathing_exercises.pdf
- https://cdn.shopify.com/s/files/1/0436/5726/5305/files/mabonelijofoxujapu.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_off00005b8f.bin` `2b402dbbd6a9ee89df7cba2ff81f8dbf5de26e9da4b3116c738f3cc6737a4f64`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B8F	5244 bytes
`font_01_sfnt_off00006d5d.bin` `1469c37178918b4793f88007ef4825de62f7b4b32213fe12b0a1724c61e272a6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D5D	9416 bytes

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