PDF malware analysis — malicious · 3d77981cb1cd509f

MALICIOUS

PDF

51.5 KB Created: 2020-08-20 10:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9bc97163ff4736e717dc328400f22476 SHA-1: 04df7914e1b7475f6b72843b2bdcbf5a0e0c135a SHA-256: 3d77981cb1cd509fde16c2dc151fac3943c37a1be94c3a2c8ddb9b2f40f0954f

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link that leads to a URL associated with a "blacklist app for android" lure. This is further supported by heuristics indicating a PDF link farm and a machine learning classifier flagging the document as malicious. The document body, though heavily obfuscated, contains the target URL and a reference to the lure. 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.com/pify?keyword=blacklist+app+for+android+2.+3.+6
- http://timufe.collaboratoryshows.com/uploads/1/3/1/6/131636725/396203391.pdf
- http://files.thefarmersdaughtergeneralstore.com/uploads/1/3/2/7/132740533/e3c16d4552e80.pdf
- https://cdn.shopify.com/s/files/1/0432/1184/9890/files/bobofasuf.pdf
- https://cdn.shopify.com/s/files/1/0435/4516/5975/files/zoruribi.pdf
- https://cdn.shopify.com/s/files/1/0429/7365/9292/files/anemia_por_deficiencia_de_vitamina_c.pdf
- https://cdn.shopify.com/s/files/1/0432/0254/3778/files/daxudanikatisavasunegul.pdf
- https://cdn.shopify.com/s/files/1/0437/4665/6408/files/1450945901.pdf
- https://cdn.shopify.com/s/files/1/0429/8627/4977/files/chronicles_of_ancient_darkness_free_download.pdf
- https://cdn.shopify.com/s/files/1/0430/7743/5556/files/25307057749.pdf
- https://cdn.shopify.com/s/files/1/0430/8844/5604/files/86619322629.pdf
- https://cdn.shopify.com/s/files/1/0436/0772/0094/files/presion_manometrica_definicion.pdf
- https://cdn.shopify.com/s/files/1/0430/3224/8469/files/academic_writing_books.pdf
- https://cdn.shopify.com/s/files/1/0441/0372/9304/files/pemifitesugepunobagod.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_off00005a1a.bin` `61f1cc23414493006ceff85a609d67e530945c1d673f0493503b2a0c4588dda6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5A1A	5328 bytes
`font_01_sfnt_off00006ca6.bin` `8ab2369b6ed5087f3bcf4bcadb2f0f530cce92a9f9d440967ef96281c922148d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CA6	5744 bytes
`font_02_sfnt_off0000803e.bin` `395f4946e9bf9923b999b29364417fc9df8c51c8e5af49a7d56445e6a49d34f3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x803E	12456 bytes
`font_03_sfnt_off0000a90c.bin` `fe1ca6a691315ef32827512bb86cd3188d7c30cfa02bd4559714794831c9b14a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA90C	16684 bytes

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