PDF malware analysis — malicious · f7ac97caf8e6d5c0

MALICIOUS

PDF

50.3 KB Created: 2020-08-15 21:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f3be01fa3982e4c033404bdc557ae556 SHA-1: 006161c6d5977725f7e89ba10a41c97372e06c48 SHA-256: f7ac97caf8e6d5c0004f6dda2e296e372c60fabf6450ae6782c4ba9d533a4168

128 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify. One of the primary links, 'https://ttraff.com/wb?keyword=general%20science%20notes%20pdf%20in%20tamil', is identified as a malicious redirector. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic suggests a lure to trick users into clicking the malicious link.

Heuristics 4

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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.com/wb?keyword=general%20science%20notes%20pdf%20in%20tamil
- http://files.upstreamprevention.org/uploads/1/3/0/8/130814112/4072026.pdf
- https://cdn.shopify.com/s/files/1/0427/8606/2495/files/we_are_fighting_dreamers_lyrics.pdf
- https://cdn.shopify.com/s/files/1/0433/5943/6951/files/japag.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/64989875230.pdf
- https://cdn.shopify.com/s/files/1/0429/6481/1935/files/73597633883.pdf
- https://cdn.shopify.com/s/files/1/0437/4265/8711/files/6th_grade_fun_worksheets.pdf
- https://cdn.shopify.com/s/files/1/0428/5782/4419/files/19469794004.pdf
- https://cdn.shopify.com/s/files/1/0448/1345/1430/files/ukulele_worship_songs.pdf
- https://cdn.shopify.com/s/files/1/0432/5149/9170/files/purazikarodikelamowubup.pdf
- https://cdn.shopify.com/s/files/1/0427/6623/7852/files/65288345065.pdf
- https://cdn.shopify.com/s/files/1/0431/5552/1687/files/kaduroredud.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_off000061bf.bin` `fb6ebab51545a2e19e8c6d7c2a6c249f7ac39f64d8ca2f8fb9ccbd9b16e45f1f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61BF	5332 bytes
`font_01_sfnt_off000073c7.bin` `31cea9ecb63c112c672cb7555e21ce04c1a485594e1a6e9c0e2ca6b464e09dc4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x73C7	7736 bytes
`font_02_sfnt_off00008a51.bin` `6d27518c6fb871e843dc4e974aee253e7b274ad028cb76e246c1b1b4c232e6ab`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A51	16364 bytes

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