PDF malware analysis — malicious · 9f8bab1263568c38

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 06:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cabeab13eb6056d09a24543e0af3a03d SHA-1: aa7448a45410b495990dab1dd1e05893aec3d685 SHA-256: 9f8bab1263568c38e6517206dbb811c6e6af19fe35cc6c37cdb98954c0aa8bc1

128 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm designed to mimic search results, directing users to a malicious redirector at 'https://ttraff.ru/wix?keyword=mcmurry+organic+chemistry+8th+editio'. This tactic is often used to deliver further malicious content or phishing pages. The presence of numerous links to external PDFs, many hosted on 'static.usrfiles.com', suggests a coordinated SEO poisoning or link farm strategy. No scripts were extracted, and the document body was heavily obfuscated, but the primary malicious intent is clear from the embedded links.

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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.ru/wix?keyword=mcmurry+organic+chemistry+8th+editio
- https://static.usrfiles.com/ugd/a58b01_c6564d73d2804eef8c227fccd3e3d76b.pdf
- https://static.usrfiles.com/ugd/f4de5e_a7773d1bb0674dd88ccfb0464f7e3993.pdf
- https://static.usrfiles.com/ugd/b8c837_2fe25d6526324c378ceb3e72ea834f89.pdf
- https://static.usrfiles.com/ugd/cf14a4_bb11bc18c7e84ef2b39beeabe34bce77.pdf
- https://static.usrfiles.com/ugd/b8c837_359302ef7ad94a2c92cf42d94a96c43f.pdf
- https://static.usrfiles.com/ugd/238140_73f7e86657c641eabc31ba57fbfebd4f.pdf
- https://static.usrfiles.com/ugd/b8c837_067fd5a819054fd1a5076994dc77ec65.pdf
- https://static.usrfiles.com/ugd/429b25_9cf40684bcb74a639714955acb91c066.pdf
- https://static.usrfiles.com/ugd/cf79db_9c478883e008438ca8e2818f4b3af186.pdf
- https://static.usrfiles.com/ugd/a467d2_30f38d502cd844fd97bf2de66f7c26bd.pdf
- https://static.usrfiles.com/ugd/b8c837_d16976069f194bbc8d388cb05b025464.pdf
- https://static.usrfiles.com/ugd/09c3c7_7cbe8303cd7b4b7f9a58690217b5c46b.pdf
- https://static.usrfiles.com/ugd/d78803_5d3ab2da6b2a4ad2802db9fdb57fc521.pdf
- https://static.usrfiles.com/ugd/b8c837_3842ec0a0f7e494db8f98f513ddb4dfc.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000609b.bin` `c77c4a5f0bcf51fd2d18f560815f5850fcc8f0531c576ec407d35afe4b1d3394`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x609B	5624 bytes
`font_01_sfnt_off0000739a.bin` `5083c7add807a57c890be9c29a2555118098f47c272cb06f6768124911d2ad99`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x739A	10236 bytes

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