PDF malware analysis — malicious · a19b11b25e2397c3

MALICIOUS

PDF

46.5 KB Created: 2020-09-17 03:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 05c67df07bb0a85c60a42bdc89c8773e SHA-1: e8bb365ed25ec2058f8a511d796c4866f1bc615d SHA-256: a19b11b25e2397c3e386de69e813ba03669ffc69e7f351fb30b37a3bbe636664

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate this PDF is designed as a link farm, likely to distribute malware or conduct phishing attacks. The primary malicious IOC is the redirector URL, which leads to further malicious infrastructure.

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.link/wix?keyword=colt+1911+manual+airsoft
- http://files.berkeleyuea.com/uploads/1/3/1/0/131070911/7996b7.pdf
- http://jepeda.emilydyersoprano.com/uploads/1/3/1/4/131409090/7753200.pdf
- http://files.bluespeedsalt.com/uploads/1/3/1/0/131069789/fojurogosaki-kajetaninipafut-mazoxafi-mizaxavoga.pdf
- http://files.vintagepen.net/uploads/1/3/0/7/130740056/bilidepamudar_mulurej_bewimil.pdf
- https://cdn.shopify.com/s/files/1/0434/0600/0282/files/pixelmon_float_stone.pdf
- https://cdn.shopify.com/s/files/1/0431/5227/7670/files/government_bursaries_application_forms_2020.pdf
- https://cdn.shopify.com/s/files/1/0437/9482/5376/files/60298093199.pdf
- https://cdn.shopify.com/s/files/1/0476/9234/9606/files/skam_italia_season_3_episode_2_release_date.pdf
- https://82fe02ae-7a84-48c4-9911-b7109711347c.filesusr.com/ugd/9f06f8_046d27b0aaee4c1f9055fccdaa23668f.pdf?index=true
- https://472f283b-3ade-497e-8a8e-d6a448f889de.filesusr.com/ugd/9f06f8_fdd221bb7cac4234a56bf0c976cb8970.pdf?index=true
- https://d3f1a19c-d5f2-45cf-87f8-048b1649562c.filesusr.com/ugd/9c66ff_5031d8774f6545b3a08bd166527209fe.pdf?index=true
- https://14b0f710-823f-4e55-a047-67fdec59dc90.filesusr.com/ugd/738632_7e6779051a7b416b948dee9386c6424d.pdf?index=true
- https://086d938b-f2bd-417e-babe-d0cf1b65b45f.filesusr.com/ugd/dcfb95_3aed00c6d7594aaaba0af7e509493398.pdf?index=true
- https://d7276139-c326-4078-8d72-af7bbb2ca95c.filesusr.com/ugd/7198c1_29b3c6abfe5b4182854c9a31f77aefcb.pdf?index=true
- https://28691ea7-6584-4ed8-9299-83bb1a8eb628.filesusr.com/ugd/e5a943_cdcacdcdf9df4f9fbb5067c59a3c9bde.pdf?index=true
- 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_off000070ea.bin` `fb42a16b1bea547f2a823dd368fef3f034b8a9899b6f98099700095f2752430b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x70EA	5024 bytes
`font_01_sfnt_off000081e5.bin` `b724219edb972fd463dcfc54083965330bb3a67e09988131879b40bda0b7b6f3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x81E5	13828 bytes

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