PDF malware analysis — malicious · 3f35228efe4d397f

MALICIOUS

PDF

43.9 KB Created: 2020-09-01 01:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9ebf7f3b6539d8f0b9f56a0426132b00 SHA-1: f268a83f7d375b5f0835906183542f7164fd8574 SHA-256: 3f35228efe4d397f28440f21f9aa077b0235fbbaa7e174c13b6f1c35b7b8cc69

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=ssh+secure+shell+portable'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to benign content, likely to mask the malicious redirector. The ML classifier strongly indicates maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.com/wix?keyword=ssh+secure+shell+portable
- https://static.usrfiles.com/ugd/f3cb45_9c4802f4cc09486facc69e53dec0294c.pdf
- https://static.usrfiles.com/ugd/1cc7e8_adef5ded34d7448ebfa2e780827b9d91.pdf
- https://static.usrfiles.com/ugd/b8c837_0d3a9aaa7b394840a10067bfcc32ede7.pdf
- https://static.usrfiles.com/ugd/b8c837_8a0b6046ad114dd39fdaab408f25ea4d.pdf
- https://static.usrfiles.com/ugd/b8c837_ebe5f5248af946c5b1cf4e1835eef8ce.pdf
- https://cdn.shopify.com/s/files/1/0435/0184/6692/files/vapesazewugav.pdf
- https://cdn.shopify.com/s/files/1/0434/1583/0695/files/advanced_calisthenics.pdf
- https://cdn.shopify.com/s/files/1/0435/1354/4863/files/lei_simples_nacional_2020.pdf
- https://cdn.shopify.com/s/files/1/0432/7764/8027/files/35986666839.pdf
- https://cdn.shopify.com/s/files/1/0438/1920/4765/files/vobolofevogipex.pdf
- https://static.usrfiles.com/ugd/96768c_2e45f82c695a43eeaef64d05cf2acd79.pdf
- https://static.usrfiles.com/ugd/e33828_ef2b791f5f9c44799d235920b36f4084.pdf
- https://static.usrfiles.com/ugd/10b11f_c2dbac9db4cf48b389980640bd7315f4.pdf
- https://static.usrfiles.com/ugd/9374a7_907bf7456e5d4b14a8d353088fd398a5.pdf
- https://static.usrfiles.com/ugd/4d400c_3e6fa9aab7bc47148b9e512d1cb3919f.pdf
- https://cdn.shopify.com/s/files/1/0437/7939/1646/files/limupubibitan.pdf
- https://cdn.shopify.com/s/files/1/0430/6681/8721/files/13840096941.pdf
- https://cdn.shopify.com/s/files/1/0430/1013/0073/files/xosar.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_off00006cd4.bin` `894cdc1eccba9c799fd427da51d67ec43707fb57f3ff57b5ceaf67d4ffc01b4b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CD4	5264 bytes
`font_01_sfnt_off00007eac.bin` `e54c9c2dd7e14d85d296d341882c246216255c3960539129665d8a23fccb1427`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7EAC	10452 bytes

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