PDF malware analysis — malicious · 3b697cd727284c18

MALICIOUS

PDF

33.4 KB Created: 2020-08-23 03:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: eec916d4758827acdb13264d8880044b SHA-1: b8a7a68d21a33a8f99d3b72adfd822f10e5129d6 SHA-256: 3b697cd727284c185cd3c17872c7bd92ace5f0b2ff30d230276baadedc1ce430

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier and contains a link farm. One of the embedded URLs, https://ttraff.com/pify?keyword=bender+gestalt+test+manual, points to known malicious redirector infrastructure. The document body appears to be obfuscated or corrupted, but the presence of numerous links to external PDFs, many hosted on Shopify, suggests a tactic to distribute malicious content or engage in SEO manipulation for malicious purposes.

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=bender+gestalt+test+manual
- http://files.leslie-yao.com/uploads/1/3/1/6/131637108/minaz-gurup.pdf
- http://jovalef.elevatecbdcosmetics.com/uploads/1/3/0/7/130739624/26413c02e0.pdf
- https://cdn.shopify.com/s/files/1/0450/2175/7590/files/71769029235.pdf
- https://cdn.shopify.com/s/files/1/0435/6859/5112/files/wedefimi.pdf
- https://cdn.shopify.com/s/files/1/0429/7110/3395/files/gobenumozel.pdf
- https://cdn.shopify.com/s/files/1/0430/8549/6482/files/molomifemejunewuge.pdf
- https://cdn.shopify.com/s/files/1/0431/2032/8865/files/doors_of_stone_news.pdf
- https://cdn.shopify.com/s/files/1/0432/7066/8448/files/copd_exacerbation_canadian_guidelines.pdf
- https://cdn.shopify.com/s/files/1/0431/6141/9927/files/25314021704.pdf
- https://cdn.shopify.com/s/files/1/0433/7546/0517/files/linejafuxabu.pdf
- https://cdn.shopify.com/s/files/1/0435/1698/5503/files/vulema.pdf
- https://doi.org/10.1007/978-
- 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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000453f.bin` `db0fa7b61a5ab1e4c2d88f7fd018054e500754269f16d646bfc678e4b8a63f0b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x453F	5192 bytes
`font_01_sfnt_off000056cd.bin` `03cc943a9d186ae361f7f9bc418a285d0fd270ddb83c362ec9a131c555948be5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x56CD	10144 bytes

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