PDF malware analysis — malicious · 90a76f6065332a99

MALICIOUS

PDF

47.8 KB Created: 2020-08-18 23:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a52f2263891b73dd56e0ddcdd5f153fd SHA-1: fd0f8bc4a07e4a15b7d450f5ef080cb9565d4aa8 SHA-256: 90a76f6065332a99d7f6ba73bb2cccf130e92d2690c68ac1edd78bbf0956d46f

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 specifically identified as a malicious redirector. The heuristic firings indicate a PDF link farm, suggesting an attempt to manipulate search results or distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the sheer volume of links and the identified malicious redirector point to a content-driven attack.

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=ost+partners+for+justice
- http://files.modtone.net/uploads/1/3/1/4/131410545/paxarugutemogafoto.pdf
- http://files.k1academy.ca/uploads/1/3/2/6/132681812/takekuwevakuwonewik.pdf
- http://vemake.moundridgelumber.com/uploads/1/3/0/7/130776418/c20e5f.pdf
- http://gefon.yankeetravelers.com/uploads/1/3/2/6/132695278/rajaloza.pdf
- https://cdn.shopify.com/s/files/1/0432/4805/8536/files/49748800868.pdf
- https://cdn.shopify.com/s/files/1/0433/1018/6654/files/96174386745.pdf
- https://cdn.shopify.com/s/files/1/0431/6374/6453/files/2017_audi_a5_convertible.pdf
- https://cdn.shopify.com/s/files/1/0433/3705/6414/files/20457856401.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49893706483.pdf
- https://cdn.shopify.com/s/files/1/0447/6190/7351/files/seafood_recipes_book.pdf
- https://cdn.shopify.com/s/files/1/0430/8851/1130/files/adjective_noun_collocations_list.pdf
- https://cdn.shopify.com/s/files/1/0429/4855/9004/files/wings_of_fire_book_in_english.pdf
- https://cdn.shopify.com/s/files/1/0428/5127/0815/files/39665158804.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_off0000573e.bin` `a566ce3105340e691c939f786e86504772a482c664788d0966c33bcb3ac8c6de`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x573E	4840 bytes
`font_01_sfnt_off0000682b.bin` `2f052ce7f2d098a6ebfa44d0e6a8cd6b798ffdc4b97a724585b0f2bc88c99536`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x682B	5080 bytes
`font_02_sfnt_off00007988.bin` `6d2f7d376be931d02c766255b4464fc36f9d51d06f9dde3967634bfd4fa96b25`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7988	10192 bytes
`font_03_sfnt_off00009cb4.bin` `ac5d9198e9e5788e2012a92f79ae3d93b0172fa872ff4df9b6836d0aaa1540d8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9CB4	16232 bytes

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