PDF malware analysis — malicious · adaa18c4d63d6d82

MALICIOUS

PDF

49.7 KB Created: 2020-08-24 23:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b8fb924588421df8bd89fd0985690f9b SHA-1: a200218396878a46904a5f8d28f9640b6a6872c7 SHA-256: adaa18c4d63d6d829a0aa1b39da57a40f2033054325146c785b6f6782c4d906f

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, which points to a URL designed to look like a manual for AutoCAD. This suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking for malicious content.

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=manual+autocad+2013+romana+pdf
- http://files.kadencekreations.com/uploads/1/3/1/6/131637876/cd82605510b7e6.pdf
- http://files.sheiladavis.ca/uploads/1/3/1/3/131380308/mixubusinegafome.pdf
- http://files.region4convention.org/uploads/1/3/0/7/130776589/serejonekaw.pdf
- https://cdn.shopify.com/s/files/1/0431/7950/7870/files/imo_file_location_in_android.pdf
- https://cdn.shopify.com/s/files/1/0429/5576/7967/files/kekiraseku.pdf
- https://cdn.shopify.com/s/files/1/0429/1028/5983/files/83331887306.pdf
- https://cdn.shopify.com/s/files/1/0440/5297/1685/files/cemu_botw_update.pdf
- https://cdn.shopify.com/s/files/1/0429/8155/6375/files/suvotowunulunexaxuf.pdf
- https://cdn.shopify.com/s/files/1/0428/9773/5843/files/4997953008.pdf
- https://cdn.shopify.com/s/files/1/0464/1174/3400/files/77574110749.pdf
- https://cdn.shopify.com/s/files/1/0430/8339/9321/files/38870954512.pdf
- https://cdn.shopify.com/s/files/1/0430/8120/3861/files/88111900432.pdf
- https://cdn.shopify.com/s/files/1/0439/0033/8331/files/vefejosogukokipinule.pdf
- https://cdn.shopify.com/s/files/1/0438/5066/2053/files/xujipavuzuravupepozaf.pdf
- https://cdn.shopify.com/s/files/1/0431/9218/9089/files/gaginazumajituk.pdf
- https://cdn.shopify.com/s/files/1/0431/1000/6940/files/logesetukafefa.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000760b.bin` `92f71bba1bba517f292487c549561a149c7cc4b117e66b242a1d01a995eac5d3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x760B	5332 bytes
`font_01_sfnt_off00008815.bin` `72ec356d14e6f71586a02113492a6339c4e793886c4c313739122f53ec8cb774`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8815	10360 bytes
`font_02_sfnt_off0000ab8b.bin` `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAB8B	4324 bytes

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