PDF malware analysis — malicious · addfcce9c4b9c308

MALICIOUS

PDF

44.2 KB Created: 2020-08-11 14:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cf79c95cb82e58673607781333910170 SHA-1: 87ad2fcfdbe4b0b9b32dad9fc66b0f832deebc52 SHA-256: addfcce9c4b9c308a14426f4e1fa678006a5b25131b3e7db10589dfffdec64e1

140 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=best+pdf+reader+android+app', is identified as a malicious redirector. The document also impersonates a signing service, likely to trick users into clicking the malicious link to 'sign' a document. No scripts were extracted from this sample.

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.
Document signing service impersonation lure medium SE_DOCUSIGN_LURE

Document impersonates DocuSign, Adobe Sign, or a similar signing service in a signing-request context
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=best+pdf+reader+android+app
- http://womuxasat.maryslittlegems.com/uploads/1/3/1/6/131606201/kavilupofegixud_kufasiluk_mefabuvak.pdf
- http://files.u-tokai.dk/uploads/1/3/0/7/130739712/8557899.pdf
- http://dowarisif.paolaniebla.com/uploads/1/3/0/8/130814328/891ba6d661.pdf
- https://cdn.shopify.com/s/files/1/0435/2465/3215/files/22930160060.pdf
- https://cdn.shopify.com/s/files/1/0437/3512/2081/files/effective_speech_and_oral_communication.pdf
- https://cdn.shopify.com/s/files/1/0430/3867/1010/files/korevujox.pdf
- https://cdn.shopify.com/s/files/1/0428/3593/5388/files/devisudipobano.pdf
- https://cdn.shopify.com/s/files/1/0430/8090/8951/files/metamorphosis_in_insects.pdf
- https://cdn.shopify.com/s/files/1/0431/3510/7233/files/vejiga_urinaria.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31240515614.pdf
- https://cdn.shopify.com/s/files/1/0429/9912/0033/files/kidinirupejoz.pdf
- https://cdn.shopify.com/s/files/1/0432/7853/2761/files/argumentative_essay_sample_middle_school.pdf
- https://cdn.shopify.com/s/files/1/0440/3258/9989/files/99264324649.pdf
- https://cdn.shopify.com/s/files/1/0432/8128/5286/files/pamolimumumivejiba.pdf
- https://cdn.shopify.com/s/files/1/0430/3486/9909/files/absceso_dentoalveolar_cronico.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_off00007038.bin` `a756f8cb32315ad8946c9e2b473c6bf0ab432b6f07ade0a1a45bd9b268c01cdb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7038	5052 bytes
`font_01_sfnt_off0000817b.bin` `4187437cceb94600547c7152d3827d96f825828277e43aea05ca9d8523a60caa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x817B	10128 bytes

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