PDF malware analysis — malicious · 701cb7a77efcc0b8

MALICIOUS

PDF

42.9 KB Created: 2020-09-01 03:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f4b72f53c9a0ac734a6b7935278cacd6 SHA-1: b7c954e10b1b2fbb57bc68ad19879cc83d8b6ed7 SHA-256: 701cb7a77efcc0b85b2de0893ed6be473c17e045644c76314597c9e7fac8b375

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract traffic, 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.cc/wix?keyword=budgeting+apps+android
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_05f0478cb90445b1bd23fb2084d983f9.pdf
- https://static.usrfiles.com/ugd/b8c837_7fb9aedc51804b0da9bd5ac73ec33ef4.pdf
- https://static.usrfiles.com/ugd/b8c837_9d97030adb904e1da4e1960c69db5cda.pdf
- https://static.usrfiles.com/ugd/289c5e_1edb79c961dd4ea4bf9fdc53223ea130.pdf
- https://static.usrfiles.com/ugd/eed56f_8f1e229455da40349955cd3e7030637a.pdf
- https://static.usrfiles.com/ugd/9b5f63_c7a8940874b84cb49fc2907ddbd0570c.pdf
- https://static.usrfiles.com/ugd/b8c837_69ac3770fcc0410eac93eacff9e17f07.pdf
- https://static.usrfiles.com/ugd/9e41f0_7b24c2ea05614c11996f13e1a6647b95.pdf
- https://static.usrfiles.com/ugd/74e905_22707714933e495b8c7e0b675ef4aba9.pdf
- https://cdn.shopify.com/s/files/1/0430/3863/8241/files/map_of_us_states_and_capitals.pdf
- https://cdn.shopify.com/s/files/1/0466/8630/6468/files/nsm_hit_120_jukebox_manual.pdf
- https://cdn.shopify.com/s/files/1/0437/1218/4474/files/92854242654.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_off00006ad2.bin` `b0fcef8ff3acdae7abf3ce036228be4f2686e78e49a82012bb8c14251516473b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6AD2	5144 bytes
`font_01_sfnt_off00007c66.bin` `0224a4c5690803c42de79d469588262fd06af5813031baa74c2cf2c23d0f9b8b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7C66	10092 bytes

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