PDF malware analysis — malicious · 8d8cd4ee72b25f89

MALICIOUS

PDF

40.2 KB Created: 2020-09-10 00:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 4402f4273ea90d0fd3169d0d3d53f329 SHA-1: be6f8d9cd70d60a6b1de8c4ad074614a522b0a0c SHA-256: 8d8cd4ee72b25f8994ce5c5595b32b312ed008c05495ecb9f121390717a73fa7

128 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, many of which point to redirector infrastructure or link farms. One critical heuristic identified a link to a known malicious redirector, and another flagged the document as a link farm. The document body, though partially corrupted, contains text related to 'credit card authorisation form template', aligning with the SE_INVOICE_LURE heuristic. The primary attack pattern involves social engineering through a fake form lure, directing users to malicious URLs.

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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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=credit+card+authorisation+form+template
- http://files.octoberpvd.com/uploads/1/3/0/7/130739340/ruxuxalomakulejuzam.pdf
- http://files.ecovalleyconstruction.com/uploads/1/3/2/7/132740494/8405873.pdf
- http://files.marystrother.com/uploads/1/3/0/9/130969876/6952387.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67641838088.pdf
- https://cdn.shopify.com/s/files/1/0436/8980/3941/files/28462438893.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libutufisolefod.pdf
- https://cdn.shopify.com/s/files/1/0434/2428/4824/files/50195743023.pdf
- https://cdn.shopify.com/s/files/1/0437/7031/4903/files/lobes_of_the_brain_and_their_functions.pdf
- https://cdn.shopify.com/s/files/1/0429/9712/1178/files/60732655504.pdf
- https://cdn.shopify.com/s/files/1/0434/0423/0805/files/refiner_s_fire_lyrics.pdf
- https://static.usrfiles.com/ugd/5bb01c_50c0cd87104e4fd7bb732bbb81f145f0.pdf
- https://static.usrfiles.com/ugd/417718_8009d2db34c842d28e5e999730b19404.pdf
- https://static.usrfiles.com/ugd/04e6f9_32725145e72449d68bcd05fa4236a12e.pdf
- https://static.usrfiles.com/ugd/0a052f_874c81df986b4c0883fa1b1a78efc28a.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_off00005e75.bin` `c83c30e224ac26af62659bae74e6533abb2bcc02ccd01e31184719d510bf187f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E75	5300 bytes
`font_01_sfnt_off0000704b.bin` `0d8c7699ba1787709eadc33000b5e596db6c34ce90571b08f9643ecdd38d52e8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x704B	10400 bytes

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