PDF malware analysis — malicious · 72127cfff408bd80

MALICIOUS

PDF

37.3 KB Created: 2020-08-21 09:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cee4a1d5dd0c03a298af80b343950aba SHA-1: 86bee7cb2f303638191ed2e2415db7be2bf0f140 SHA-256: 72127cfff408bd80df10c94497bdae0a5a449f3fecc49c8bad8f3843a6f055cb

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links and text that direct users to a malicious redirector URL, disguised as a resource for finding PowerPoint templates. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a known malicious link. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to malicious content, likely 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.com/pify?keyword=powerpoint+templates+folder+location
- http://files.crompers.com/uploads/1/3/0/8/130874631/bf18bab.pdf
- http://files.hldinspections.com/uploads/1/3/2/6/132680922/xegilomomove.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0434/5777/3725/files/fafopekojexigum.pdf
- https://cdn.shopify.com/s/files/1/0431/5856/9128/files/dedorepijawa.pdf
- https://cdn.shopify.com/s/files/1/0431/8943/6580/files/letolutipupugewurejafi.pdf
- https://cdn.shopify.com/s/files/1/0431/3825/2957/files/bubble_world_game_free_for_pc.pdf
- https://cdn.shopify.com/s/files/1/0430/8808/5145/files/73270332822.pdf
- https://cdn.shopify.com/s/files/1/0431/8537/3333/files/carrier_air_conditioning_control_manual.pdf
- https://cdn.shopify.com/s/files/1/0429/6772/8279/files/63658020108.pdf
- https://cdn.shopify.com/s/files/1/0435/5221/1099/files/57626249404.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_off0000559d.bin` `85abc7143dd5ddc93379085c4c363c4a8949dcab023e83df8050c76aa1441876`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x559D	5396 bytes
`font_01_sfnt_off000067df.bin` `934db156f07aaa648b182729462d7605299288af143f33784fa4db19dc7c74f1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67DF	9652 bytes

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