PDF malware analysis — malicious · e84a39ee8b6a4363

MALICIOUS

PDF

51.0 KB Created: 2020-08-04 04:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b7b4f34a430c5a9be281c10c06a8f0c6 SHA-1: 21b7ae08b7deb6fedb1bfc0329996a2aa3cef77e SHA-256: e84a39ee8b6a4363da35e1b70c2a19fece01b891ce8f20d9684ab28dc50f1711

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, identified as a link farm, with the primary redirector pointing to a known malicious URL. The ML classifier also strongly indicated maliciousness. The document body text and embedded links suggest a lure to academic or informational content, which is a common tactic for phishing or malware delivery.

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.ru/pify?keyword=understanding+computers+today+and+tomorrow+chapter+5+pdf
- http://files.aliciaallenphotography.com/uploads/1/3/1/4/131437669/kalinurefu.pdf
- http://files.goldfishprints.net/uploads/1/3/0/7/130775846/mevakejozimew-malidaguvefudas-vafobuke-dalufekuw.pdf
- http://files.danettemariealbino.com/uploads/1/3/2/7/132712209/7259567.pdf
- http://maxolut.wolsinghamwayfarers.co.uk/uploads/1/3/1/4/131452821/vukafisineg.pdf
- https://cdn.shopify.com/s/files/1/0433/0638/5558/files/81495180464.pdf
- https://cdn.shopify.com/s/files/1/0431/1603/6262/files/35264684098.pdf
- https://cdn.shopify.com/s/files/1/0434/4040/6684/files/63682373156.pdf
- https://cdn.shopify.com/s/files/1/0432/2977/3982/files/nidaxulisutijinigurumodi.pdf
- https://cdn.shopify.com/s/files/1/0434/7019/2802/files/kigixemo.pdf
- https://cdn.shopify.com/s/files/1/0433/5167/0943/files/sozukovobogosidewe.pdf
- https://cdn.shopify.com/s/files/1/0432/2508/8168/files/pegozijukeworifopere.pdf
- https://cdn.shopify.com/s/files/1/0431/8153/9483/files/dilinimokodezupux.pdf
- https://cdn.shopify.com/s/files/1/0445/4429/5076/files/verizon_dns_servers.pdf
- https://cdn.shopify.com/s/files/1/0431/1698/6534/files/the_outer_limits_season_2_episode_17.pdf
- https://cdn.shopify.com/s/files/1/0429/3358/4035/files/wezetokaduzizowiran.pdf
- https://cdn.shopify.com/s/files/1/0433/7487/0689/files/biblia_paralela_ingles_espaol.pdf
- https://cdn.shopify.com/s/files/1/0431/4375/7992/files/xagonap.pdf
- https://cdn.shopify.com/s/files/1/0428/2833/3212/files/41686504043.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_off00007dbf.bin` `1d9d54e750a269fcad985a1f8da9db6f50050961dc5835362faef5eea9e1f9a6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7DBF	5844 bytes
`font_01_sfnt_off000091a0.bin` `ecdc94c17ba632439f3ee7541c1f9c4f68e0b2202e69996a0e0163d51d8fbab0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x91A0	13988 bytes

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