PDF malware analysis — malicious · 4eb96e4eaee66bcb

MALICIOUS

PDF

49.4 KB Created: 2020-08-15 22:40:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 87c35dc15842e6e18288703b2aebde04 SHA-1: 25072d67f17753035075dfdea5f486aae6e9812e SHA-256: 4eb96e4eaee66bcbd503fb7fb738d1415f4137afd654d5e7e792553e3fb03a0a

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body, though partially corrupted, contains text related to 'coronary artery disease article pdf' and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent. The presence of numerous Shopify-hosted PDF links indicates a link farm strategy to improve search engine ranking and distribute malicious content.

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=coronary+artery+disease+article+pdf
- http://files.barnfinddazzled.com/uploads/1/3/1/8/131872105/ec4c01f3d9.pdf
- http://files.noiinsw.com/uploads/1/3/2/6/132683088/ximitazugavobom.pdf
- http://files.michaelstiertherapy.com/uploads/1/3/2/8/132816096/gibojifajimi.pdf
- https://cdn.shopify.com/s/files/1/0428/6555/7671/files/history_of_english_fiction.pdf
- https://cdn.shopify.com/s/files/1/0433/8316/0983/files/jemojenevawik.pdf
- https://cdn.shopify.com/s/files/1/0429/1022/0447/files/davipu.pdf
- https://cdn.shopify.com/s/files/1/0431/8176/8872/files/my_sql_commands.pdf
- https://cdn.shopify.com/s/files/1/0439/5145/6411/files/lobumifivo.pdf
- https://cdn.shopify.com/s/files/1/0433/8286/6072/files/jalusajasulugusija.pdf
- https://cdn.shopify.com/s/files/1/0437/3096/0549/files/3457752150.pdf
- https://cdn.shopify.com/s/files/1/0428/1470/1735/files/39817894484.pdf
- https://cdn.shopify.com/s/files/1/0428/3272/4124/files/57250628612.pdf
- https://cdn.shopify.com/s/files/1/0430/7730/4484/files/kodogalabav.pdf
- https://cdn.shopify.com/s/files/1/0440/1859/8038/files/31125238222.pdf
- https://cdn.shopify.com/s/files/1/0428/5045/1623/files/anatomie_systme_respiratoire.pdf
- https://cdn.shopify.com/s/files/1/0432/5575/9011/files/47607256478.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_off00007ccc.bin` `583d41dac17d9ffc8e615a6969f9b103a78292782e25e48ee45f82718e47a783`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7CCC	5156 bytes
`font_01_sfnt_off00008e6e.bin` `9f13452f942cb8ce2cd376e29cff4b11edde7ce480fa2a24fd7c5730955e637a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E6E	13284 bytes

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