PDF malware analysis — malicious · ac4ab0992318b04c

MALICIOUS

PDF

39.5 KB Created: 2020-08-30 00:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b62a35a24af1df7f9182f071f2416504 SHA-1: 487be2cccc6d9188de8939382544693c0c0b4e72 SHA-256: ac4ab0992318b04c12417316586ea1759dc3d9d5b3160f749c6ba22a140c6605

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign PDFs. The ML classifier strongly supports the malicious nature of this document. No scripts were extracted from this sample.

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.me/wix?keyword=xyz+da+vinci+jr
- https://cdn.shopify.com/s/files/1/0430/4997/5959/files/63731996189.pdf
- https://cdn.shopify.com/s/files/1/0431/0034/0381/files/45571297115.pdf
- https://cdn.shopify.com/s/files/1/0452/8062/4802/files/cp30_batching_plant_manual.pdf
- https://cdn.shopify.com/s/files/1/0461/0903/2612/files/77637744622.pdf
- https://static.usrfiles.com/ugd/b8c837_0491f689e35e4392864592d67c46fc8b.pdf
- https://static.usrfiles.com/ugd/8e1900_f1a49481a4aa499eb46d4f3b4264edf3.pdf
- https://static.usrfiles.com/ugd/33a16d_f4b69540695f49498afa86bf00da6369.pdf
- https://static.usrfiles.com/ugd/576447_8f4c7b34c8db40d2b003dd770e15daca.pdf
- https://static.usrfiles.com/ugd/1c8c6c_f359171bbcf6499b900ecb67dfe0a65a.pdf
- https://cdn.shopify.com/s/files/1/0429/8070/4405/files/64383897992.pdf
- https://cdn.shopify.com/s/files/1/0433/1569/1675/files/basic_core_java_interview_questions_and_answers_for_freshers.pdf
- https://cdn.shopify.com/s/files/1/0432/6886/6208/files/plastic_memories_episode_1_gogoanime.pdf
- https://cdn.shopify.com/s/files/1/0428/1712/6567/files/42519928274.pdf
- https://static.usrfiles.com/ugd/2f3ac6_c5eab11cc5384241a47c9462ac8224d7.pdf
- https://static.usrfiles.com/ugd/b8c837_ff910d170d6841a3b17d15e22acd6871.pdf
- https://static.usrfiles.com/ugd/b8c837_73aa916ac39f44e487af74090e18aff9.pdf
- https://static.usrfiles.com/ugd/b8c837_96a9542bb98a4523af1b387324864f68.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_off00005b3a.bin` `0d2926d069578993566e25d9ccbb59225025ae41865b2268576a8d14a2750847`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B3A	4988 bytes
`font_01_sfnt_off00006c4e.bin` `3fdfa113c31b11b18d68394a2f1dd307a33e49a32c2d2288cc7888a9efc75554`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C4E	10864 bytes

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