PDF malware analysis — malicious · 9edf47d16f6776a5

MALICIOUS

PDF

59.0 KB Created: 2020-08-31 05:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 025b540d5bdb7db8b7e409059efb0add SHA-1: 42897d115ca74c1dec391d9f72d97377ff9deafc SHA-256: 9edf47d16f6776a5f3b502e0c58e2d1f761c5258ef0b05053793be42b4b1ca04

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious due to the presence of a link to a known malicious redirector. The document body contains garbled text but also includes the same URL found in the heuristic firing, suggesting it is intentionally placed. The file also contains a large number of embedded links, many pointing to static.usrfiles.com, which is identified as a link farm. The primary malicious indicator is the redirector URL, which is likely used to funnel users to a malicious destination.

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=the+hollywood+reporter+roundtable+directors
- https://static.usrfiles.com/ugd/b8c837_a7c462d476e04256a53a9cc320975875.pdf
- https://static.usrfiles.com/ugd/e1d12c_024ccbccc9cb4c538fc3a25ff935fbfa.pdf
- https://static.usrfiles.com/ugd/1f2646_c8f0c75cfa064584a3a4113a8c6f16e5.pdf
- https://cdn.shopify.com/s/files/1/0465/2456/3614/files/tufobenebezomadifudapon.pdf
- https://cdn.shopify.com/s/files/1/0429/3689/3599/files/going_home_piano_sheet_music_free.pdf
- https://cdn.shopify.com/s/files/1/0445/7899/6383/files/bangla_song_lyrics_download.pdf
- https://cdn.shopify.com/s/files/1/0435/8186/6143/files/crown_xl_602.pdf
- https://cdn.shopify.com/s/files/1/0433/8378/3575/files/brgschaft_eltern_miete.pdf
- https://cdn.shopify.com/s/files/1/0429/5216/3482/files/636870136.pdf
- https://cdn.shopify.com/s/files/1/0429/1795/3702/files/makitovu.pdf
- https://static.usrfiles.com/ugd/b8c837_92acc624d2f3472e8150f51cdc7d6fa7.pdf
- https://static.usrfiles.com/ugd/b8c837_8b9369de28884babb502e35e5b2e1cb9.pdf
- https://static.usrfiles.com/ugd/99afdc_8bee8de34c9a41cfad66ecc600631feb.pdf
- https://static.usrfiles.com/ugd/d55797_aa307709e4604b2a8c673cb19f38f18a.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_off00009bf4.bin` `eb54e84f9fd9772d68ab428562b1d87fe3c1c26cb1ef0bf586cf83ff96154162`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9BF4	5328 bytes
`font_01_sfnt_off0000ae11.bin` `741a067ffce1ca9cb75a89a5d762b5938cfe32356e74ffc23d0858b3bca6655a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAE11	10388 bytes
`font_02_sfnt_off0000d126.bin` `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD126	4324 bytes

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