PDF malware analysis — malicious · d9a31284d6b07c2b

MALICIOUS

PDF

76.0 KB Created: 2020-10-16 18:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a420cf0ed1b9f2bc42db745cc5cf33de SHA-1: da5a6b042059019fb29e1cd09df7f769348f4605 SHA-256: d9a31284d6b07c2b0a785f843a8221bc40eb72921d70d8f6e3b37c25d6bf9ba6

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a malicious redirector disguised as a "cbse class 6 maths book pdf download" lure. The primary malicious URL is https://ttraff.club/123?keyword=cbse+class+6+maths+book+pdf+download, which is flagged as a known malicious redirector. The document body, though heavily corrupted, contains references to the lure and the malicious URL, reinforcing the phishing attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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.club/123?keyword=cbse+class+6+maths+book+pdf+download
- https://cdn-cms.f-static.net/uploads/4366302/normal_5f899b3eac814.pdf
- https://cdn-cms.f-static.net/uploads/4366647/normal_5f871cf710651.pdf
- https://cdn-cms.f-static.net/uploads/4369336/normal_5f880018a5384.pdf
- https://cdn-cms.f-static.net/uploads/4366660/normal_5f896a66ef49c.pdf
- https://cdn.shopify.com/s/files/1/0433/6739/9575/files/52776450718.pdf
- https://cdn.shopify.com/s/files/1/0428/6201/8716/files/59623699223.pdf
- https://cdn.shopify.com/s/files/1/0495/9109/1352/files/86262713252.pdf
- https://uploads.strikinglycdn.com/files/8fb91f6e-a968-427d-92c2-0daa343b72e7/kibugixosobidinobezemijot.pdf
- https://uploads.strikinglycdn.com/files/c94b4921-b7b3-49f5-b7a4-85edfebcc142/moloxipovimax.pdf
- https://uploads.strikinglycdn.com/files/92c2e1d8-5fa9-47c3-98b1-ee16d6c381dd/nixore.pdf
- https://cdn.shopify.com/s/files/1/0497/8674/9079/files/long_john_silvers_fish_nutrition_information.pdf
- https://cdn.shopify.com/s/files/1/0493/3068/4063/files/59404897756.pdf
- https://cdn.shopify.com/s/files/1/0437/4816/3738/files/xepefevidoxajepizako.pdf
- https://uploads.strikinglycdn.com/files/9accd916-4375-42a4-ba02-20b4a4ff0631/71302964423.pdf
- https://uploads.strikinglycdn.com/files/27d57ea8-4e9f-4ad1-aab0-52574f7e91d6/94494425037.pdf
- https://uploads.strikinglycdn.com/files/4c821407-3f04-4740-a893-cf2acb88b8ee/zopusibegazurarukefune.pdf
- https://uploads.strikinglycdn.com/files/f3f6f8b5-0a0b-4611-8aff-f1765a4154ed/tajawagunog.pdf
- https://uploads.strikinglycdn.com/files/c19fe791-2be3-4080-b6de-68edce4c24e8/19710676411.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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00009768.bin` `f1b52ad872bbecea017452a05e5116018854358ec95c91798a668965d2bf5dc4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9768	5512 bytes
`font_01_sfnt_off0000aa0c.bin` `d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAA0C	3720 bytes
`font_02_sfnt_off0000b56f.bin` `99125a4c872f5c0a24ceb2bca1fd936e606f644f87927a8938fb6e4c57d445cf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB56F	14248 bytes
`font_03_sfnt_off0000e17d.bin` `ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE17D	16164 bytes
`font_04_sfnt_off0000f696.bin` `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF696	4324 bytes
`font_05_sfnt_off00010497.bin` `7a00761083e2e202f7cc2e0ab70bf9be580eba157a18a8d9f3a333a1abdc6500`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10497	8736 bytes

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