PDF malware analysis — malicious · a5ae3d92f33f1de8

MALICIOUS

PDF

48.4 KB Created: 2020-09-01 00:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1f637606e65ca41cb65c225cebea4e91 SHA-1: 6cf49ee0643d5779c2366764fe4499b9da687c25 SHA-256: a5ae3d92f33f1de8992af4236bc0d3665bc33bb0b02c83c1bd9b490d40467b57

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body also contains the same URL, presented as a search result for 'surah yasin pdf slideshare', indicating a lure to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external documents.

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/wix?keyword=surah+yasin+pdf+slideshare
- https://static.usrfiles.com/ugd/9cb927_0e50e81d2c1b451bb8b87a478cb3c740.pdf
- https://static.usrfiles.com/ugd/38bf1f_7bc1716233bc46089b127fd7082badd9.pdf
- https://static.usrfiles.com/ugd/97368a_17511a1b216b426b8bb84a7a5f6405b6.pdf
- https://cdn.shopify.com/s/files/1/0435/2750/4024/files/84166232387.pdf
- https://cdn.shopify.com/s/files/1/0441/2823/9768/files/antidoto_barbituricos.pdf
- https://cdn.shopify.com/s/files/1/0430/0242/9593/files/85505402344.pdf
- https://cdn.shopify.com/s/files/1/0436/7079/8489/files/rigoxomubogosuxiwej.pdf
- https://static.usrfiles.com/ugd/de02f3_fcae9f15af9a49ab8d714d850af3a7d1.pdf
- https://static.usrfiles.com/ugd/b8c837_013d51f8434549aa9d242b3c5c66603c.pdf
- https://cdn.shopify.com/s/files/1/0465/9121/3733/files/falefodutodofino.pdf
- https://cdn.shopify.com/s/files/1/0435/6410/5886/files/24106899654.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000061af.bin` `4b30fc2e6688681f9db11fc683f8ef4491ba8264ae5fab14e7183bb677c61a9f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61AF	5332 bytes
`font_01_sfnt_off000073d1.bin` `201c983ee3493295c3e9208e0c816e09d415b8cd185b15b799c1b2e36fb12d67`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x73D1	10824 bytes
`font_02_sfnt_off00009878.bin` `e8c31dc19faa4bf3acb6cb1dce81918332a68cad3d8a895991721357e26c0d71`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9878	18312 bytes

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