PDF malware analysis — malicious · ca9640e5150f99c4

MALICIOUS

PDF

56.9 KB Created: 2020-08-12 18:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3e3e1d7109674fcc689856fc1d5cb444 SHA-1: 4cbd86769dfc2a97995018b4613d43bd20d9fa0b SHA-256: ca9640e5150f99c4faacddda3177a42eb3479cffde6d4d44a987825ee581c7e9

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many of which point to external PDF files hosted on various domains, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure, disguised as educational content. This indicates a social engineering attack aiming to redirect users to malicious sites.

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/wb?keyword=all%20formulas%20of%20current%20electricity%20class%2012%20pdf
- http://peteguku.tnetech.com/uploads/1/3/1/1/131164278/gaxizase.pdf
- http://files.samhoughtonchallenge.co.uk/uploads/1/3/0/7/130776817/betine.pdf
- http://files.parkerconverse.com/uploads/1/3/1/3/131379280/bd9bb.pdf
- http://files.tristaricelandics.com/uploads/1/3/0/8/130813416/675674.pdf
- https://cdn.shopify.com/s/files/1/0428/2174/6847/files/loragixadekefutag.pdf
- https://cdn.shopify.com/s/files/1/0440/8823/0053/files/rezitewikiwupebop.pdf
- https://cdn.shopify.com/s/files/1/0428/4504/4892/files/protected_area_definition.pdf
- https://cdn.shopify.com/s/files/1/0428/5045/1623/files/corazon_de_nio.pdf
- https://cdn.shopify.com/s/files/1/0428/9550/7622/files/vodegu.pdf
- https://cdn.shopify.com/s/files/1/0434/1320/9246/files/30562709357.pdf
- https://cdn.shopify.com/s/files/1/0445/3564/4319/files/data_center_management.pdf
- https://cdn.shopify.com/s/files/1/0431/2875/0241/files/zudoramupugofimip.pdf
- https://cdn.shopify.com/s/files/1/0431/0004/5465/files/77560907085.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000079b7.bin` `bf37f1992bb25240894051f49fb223724403f601502d3ee27510516e756f156b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x79B7	5576 bytes
`font_01_sfnt_off00008ca1.bin` `a88dc0b4de2c9ee3c630125ea67d8ce93df3fd08aafb518658ee2bddeb349435`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CA1	10752 bytes
`font_02_sfnt_off0000b10c.bin` `2fbb528c30fae61c70ff4082faa5fece981988df10abad1a91cab371b780b9de`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB10C	16192 bytes
`font_03_sfnt_off0000c674.bin` `c6b59e4a8815360c71291c00df27e53daae0eb8d3a5cb98a1e9f2657902e5332`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC674	4048 bytes

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