PDF malware analysis — malicious · 899a048f47ecdb57

MALICIOUS

PDF

76.5 KB Created: 2020-09-10 02:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 363f25771b91c46c6594decc8b347fce SHA-1: 664bd732972139c4e4a12cf4f4687ac5cb869c59 SHA-256: 899a048f47ecdb571c4513e5b19516d4606866cd99e66d89161086938a0af469

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to mimic search results, specifically for 'absalom and achitophel text pdf', leading to a malicious redirector. This suggests a phishing or scam attempt to drive traffic to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points towards a link farm or SEO manipulation tactic.

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.link/wix?keyword=absalom+and+achitophel+text+pdf
- http://sudimu.faithmusicacademy.com/uploads/1/3/1/3/131383434/madudis.pdf
- http://kifemado.mywynfield.com/uploads/1/3/0/8/130814328/fcf33ac060.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/735424_5f4204cd48be4cf1b4af5e7164993867.pdf
- https://static.usrfiles.com/ugd/5ecadc_1f4df649656c43fc9f929cdc7cb3d9bf.pdf
- https://static.usrfiles.com/ugd/909b15_e14e31f9fb04469bb6133901282df938.pdf
- https://static.usrfiles.com/ugd/d5d855_9a27a7a3a77c47a5ae4c5061cfd09207.pdf
- https://static.usrfiles.com/ugd/79e0dc_8663e84f0a174134a01476f219f70a39.pdf
- https://static.usrfiles.com/ugd/0a0016_f099c862c7c841ee8d52df549f7fc264.pdf
- https://static.usrfiles.com/ugd/09273f_2cccb36819d44ce89a80cc384cb1a47c.pdf
- https://static.usrfiles.com/ugd/e2f197_0af595cdcbf241a6bd264df72964bd4e.pdf
- https://cdn.shopify.com/s/files/1/0431/0997/4169/files/philip_glass_floe_sheet_music.pdf
- https://cdn.shopify.com/s/files/1/0430/1357/0709/files/garogiw.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_off0000efbf.bin` `2db45bd746951e12406d3bfaf749244fd2c4f0e8c666827c23aea5dbe769eb61`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFBF	5496 bytes
`font_01_sfnt_off0001024c.bin` `e0c676197c40c35155951bde04a80adf463fd2a5b8b2feddad25500388b023f8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1024C	10296 bytes

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