PDF malware analysis — malicious · c34abf50c37bbbb9

MALICIOUS

PDF

46.5 KB Created: 2020-08-07 16:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 04f9bd3bea2e793c89a709b355f5d220 SHA-1: 80657f895d16eedf4f340c06ceef8cd3f9f7af4a SHA-256: c34abf50c37bbbb91c1fab83a1aca91da9b3f8edcc80f60279b3387069ea0c77

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=acland+anatomy+pdf', which is flagged as a malicious redirector. This suggests the PDF is designed to lure users to malicious sites, likely for phishing or further malware delivery.

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=acland+anatomy+pdf
- http://files.teachtechtalk.com/uploads/1/3/1/4/131483214/7180072.pdf
- http://files.christianemillinery.com/uploads/1/3/1/3/131380440/a2b53be9.pdf
- http://files.navedbakali.com/uploads/1/3/2/7/132740594/rumizivixa.pdf
- https://cdn.shopify.com/s/files/1/0431/8671/6830/files/jusosakavulafoxakig.pdf
- https://cdn.shopify.com/s/files/1/0432/4248/7972/files/georgia_driver_s_manual.pdf
- https://cdn.shopify.com/s/files/1/0431/6728/5410/files/xaligakaz.pdf
- https://cdn.shopify.com/s/files/1/0430/9411/4455/files/english_reading_lessons_for_beginners.pdf
- https://cdn.shopify.com/s/files/1/0428/6844/1254/files/sotodipozibof.pdf
- https://cdn.shopify.com/s/files/1/0428/0002/1667/files/jolasitukake.pdf
- https://cdn.shopify.com/s/files/1/0428/8738/1155/files/47818161182.pdf
- https://cdn.shopify.com/s/files/1/0438/0377/1041/files/94722492503.pdf
- https://cdn.shopify.com/s/files/1/0440/1093/0341/files/instrumentation_amplifier_experiment.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45235944591.pdf
- https://cdn.shopify.com/s/files/1/0429/8014/7359/files/96064087141.pdf
- https://cdn.shopify.com/s/files/1/0428/2161/5775/files/86943653168.pdf
- https://cdn.shopify.com/s/files/1/0440/7066/6392/files/linux_cluster_commands.pdf
- https://cdn.shopify.com/s/files/1/0430/5063/1319/files/xuseb.pdf
- https://cdn.shopify.com/s/files/1/0433/9158/2357/files/html_tags_book.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_off0000786d.bin` `d4656f8703b244880c1d83b2654b67bcaf1dbab2756b44a601b47f17a3382ec9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x786D	5120 bytes
`font_01_sfnt_off000089d8.bin` `7d4d6fbf436c6b3b7089abd76098dd8e4a456d8761df17530cd189366bed060b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x89D8	10412 bytes

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