PDF malware analysis — malicious · b41d2f7b9c35d15e

MALICIOUS

PDF

41.3 KB Created: 2020-09-20 23:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 68a945fcc719d6c74657baba9169719a SHA-1: 05daaed2866e8e764f763f3f6e060d3bcb4265ee SHA-256: b41d2f7b9c35d15e0a5721f8b76a4750ab50d40beeac291c6873c740f6bfa51c

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a mass of external links, many of which point to redirector infrastructure. One critical heuristic identified a link to a known malicious redirector, ttraff.me, which is likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The presence of numerous PDF links suggests a link farm or a method to obscure the final malicious destination.

Heuristics 3

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.
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.me/wix?keyword=reading+thermometers+worksheet+answers
- http://files.brightlikeblack.com/uploads/1/3/1/0/131070452/poveraxiw-pewalaru-tuduj.pdf
- http://givil.gohmtc.com/uploads/1/3/1/4/131438741/jalifilux.pdf
- http://kibul.rachelsweetcreations.com/uploads/1/3/0/7/130739664/jixuso-mepexiwinow.pdf
- https://6843bd0a-acc5-4a3e-9f58-ceca341d763f.filesusr.com/ugd/733c1f_4097dee739a845318e069d22709bc824.pdf?index=true
- https://981645e3-703e-441f-bb28-de7ca8359f85.filesusr.com/ugd/4c1554_b5c1e26987a64aa2aacc1e3eef6321e0.pdf?index=true
- https://0a1d88d6-706c-40ea-964c-0c3f70cc8bd0.filesusr.com/ugd/90423f_7f16cd585dae4774b6fd34809a12e973.pdf?index=true
- https://f3514e9c-2210-4927-babb-b3a2b835aa31.filesusr.com/ugd/44b221_7e5ead5cb23a45a3800e96a52678575f.pdf?index=true
- https://59b6fa4f-4e3b-4c4d-9b74-c0c89e6793c1.filesusr.com/ugd/724bd4_6e271e57e84a4da9a00824dbf686c7e4.pdf?index=true
- https://516f7ec0-decc-41fe-8115-5b83d7d2d2f9.filesusr.com/ugd/c345b0_ec71b812f48e41a7b233e01dc7bff5e6.pdf?index=true
- https://d7d4f44e-3881-4bf6-b2e2-76725b35a780.filesusr.com/ugd/e481ce_edf761c206944cefae59ac33cd3d034f.pdf?index=true
- https://60526d8b-a1a1-4244-b903-c3934ac56334.filesusr.com/ugd/0c8cc8_b26afd8aa00147fc82604e9d4433324c.pdf?index=true
- https://b94c6264-7caa-474f-9efb-a8f635931fa4.filesusr.com/ugd/43d2fc_fcee4de9bc224f969239d74842a3ec98.pdf?index=true
- https://58269e0a-5c05-48c3-8e78-dd6877151c7c.filesusr.com/ugd/bcc0e4_a75d31b74b1441da88b61e79a8236026.pdf?index=true
- 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_off000061cb.bin` `f4633deb24616210bcdd6a0d5d645da7995c3c58ea1ef80292206602e29b11af`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61CB	5368 bytes
`font_01_sfnt_off000073fb.bin` `e6a9f681066bed751653fdbe4c31d7c70a1974d9db80b3cca2a08f31324f2c42`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x73FB	10648 bytes

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