PDF malware analysis — malicious · 0438da6ad4b9eca4

MALICIOUS

PDF

56.8 KB Created: 2020-09-13 23:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 8ef7f709b6ecd3d3340620e222d5e77b SHA-1: 170a36d080af786dd4db687228a37260239d9225 SHA-256: 0438da6ad4b9eca4b11a271115be0f17e32f8cd8b005fbba0803a7cf8c5262db

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded links, many of which point to a redirector service. The ML classifier and heuristics strongly indicate malicious intent, likely to direct users to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure.

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/pify?keyword=headbang+in+the+fight+arena+pub
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/edb4a7_f7590aea50d444f9bbe422c0cc769ad2.pdf
- https://static.usrfiles.com/ugd/c3548c_2701550485c8403eac6b623145240725.pdf
- https://static.usrfiles.com/ugd/c345b0_8c869c0025f44631aa133351c5a1e41a.pdf
- https://static.usrfiles.com/ugd/3b0c81_306247e217fa427cb5842a7126a18e2d.pdf
- https://static.usrfiles.com/ugd/ca32a8_bfbcd56dd187470c829ccd9122e710ca.pdf
- https://cdn.shopify.com/s/files/1/0433/0346/9221/files/latumimofujutotiteme.pdf
- https://static.usrfiles.com/ugd/95b9ea_2706df0f0e634dc7bfa19f1aefafbe0b.pdf
- https://static.usrfiles.com/ugd/5de1df_51203ce2129241c980b5dbbf1e38dceb.pdf
- https://static.usrfiles.com/ugd/2dbf5a_9615f5bf91244f338e17f2b4fa65e39c.pdf
- https://static.usrfiles.com/ugd/590778_eb41c21ea95e4c9cb76de54d8d901859.pdf
- https://static.usrfiles.com/ugd/be5703_a5e9f0d3322c49408fcfdb9dcf5bcfb7.pdf
- https://static.usrfiles.com/ugd/d94ae5_4bf3fa933e02406088e5e9ce79f6b607.pdf
- https://static.usrfiles.com/ugd/e33828_186db5bb95064bf8867fba384cdd9839.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_off0000a1fa.bin` `74ae57350cc4c7e551edf70ec2ca6b59d599b8badcad5d1945e50a3f633e093c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA1FA	5196 bytes
`font_01_sfnt_off0000b39c.bin` `7b70cbe1c59a0a41c36415042cf00adc6a3adad9a5d23a1ed5bcbe6c96879d54`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB39C	10080 bytes

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