PDF malware analysis — malicious · 250d305c5532d469

MALICIOUS

PDF

41.3 KB Created: 2020-07-28 08:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9c9831485d3bb04f60bcb336c07bff9b SHA-1: 82bffd5c57c0d2aa3907c00f5dba10a6bf4d24e7 SHA-256: 250d305c5532d4694768bad5d2b1c63205cd16d1c672da20cbf7bb7ee709c1d0

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, identified as a link farm. One of these links points to a known malicious redirector, ttraff.cc, which likely serves as a gateway to further malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated.

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.cc/pify?keyword=prepositions+exercises+with+answer+key+pdf
- http://files.jethartcallantsfestival.com/uploads/1/3/2/6/132682640/bokoga-nizorozagegojak-gusegunote.pdf
- http://files.maltesemanor.com/uploads/1/3/1/3/131380158/fb4fe2d1.pdf
- http://files.ponahealth.com/uploads/1/3/1/1/131164519/vesatoserudebekipap.pdf
- http://files.willycosmosguidetohotsprings.com/uploads/1/3/2/6/132682723/9d2a0.pdf
- http://files.spiritwalk.info/uploads/1/3/2/8/132814990/zoguwidis-ritoputabese-zanuzizuriwiwa.pdf
- http://files.willycosmosguidetohotspr
- https://cdn.shopify.com/s/files/1/0437/6199/1841/files/51852552754.pdf
- https://cdn.shopify.com/s/files/1/0431/3733/5464/files/42599818320.pdf
- https://cdn.shopify.com/s/files/1/0428/2508/9191/files/9665389815.pdf
- https://cdn.shopify.com/s/files/1/0429/6255/0940/files/3595828678.pdf
- https://cdn.shopify.com/s/files/1/0432/3626/2050/files/muwivifid.pdf
- https://cdn.shopify.com/s/files/1/0431/0017/6544/files/neputap.pdf
- https://cdn.shopify.com/s/files/1/0434/6927/5286/files/parixufufoxabenavebabozul.pdf
- https://cdn.shopify.com/s/files/1/0440/9117/9160/files/47533730944.pdf
- https://cdn.shopify.com/s/files/1/0435/1682/1672/files/fovepozidoduzutit.pdf
- https://cdn.shopify.com/s/files/1/0429/6635/2025/files/xidatufexo.pdf
- https://cdn.shopify.com/s/files/1/0431/7036/5602/files/275037454.pdf
- https://cdn.shopify.com/s/files/1/0429/3473/0911/files/mexelejorulixovonatipel.pdf
- https://cdn.shopify.com/s/files/1/0437/1113/5894/files/mekamotatoka.pdf
- https://cdn.shopify.com/s/files/1/0429/9345/1159/files/31336987044.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_off000061a5.bin` `e084fdffc489c7a926c8c8a6d10743bc96258987a657a06f318c9201358e21dd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61A5	5328 bytes
`font_01_sfnt_off000073ca.bin` `902f2aa49db51f7b44a6a8d8ab545da7cc061ca89990352aadd8b3f9475f7b89`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x73CA	10500 bytes

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