Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1342c7bb12dbd25…

MALICIOUS

PDF

38.3 KB Created: 2020-08-31 16:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d04c08a91ffe240cfcfee446071b9da SHA-1: fde1cbc084c62b3016509680ce86bae209973888 SHA-256: b1342c7bb12dbd253a53db2c6961789fd94e2bd3ed91b11003a836b681616e2c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, a technique often used in SEO link farms to manipulate search engine rankings or distribute malicious content. One of the primary links, 'https://ttraff.com/wix?keyword=attendance+sheet+template+for+preschool', is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users through seemingly legitimate content to a malicious site.

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.com/wix?keyword=attendance+sheet+template+for+preschool
    • https://cdn.shopify.com/s/files/1/0433/4511/7342/files/beletar.pdf
    • https://cdn.shopify.com/s/files/1/0439/1724/6632/files/senesivazijesepu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97454987384.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3565/files/32058223725.pdf
    • https://cdn.shopify.com/s/files/1/0430/8792/1313/files/crowding_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/4184/0552/files/33549844564.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/90360711823.pdf
    • https://static.usrfiles.com/ugd/aff7ca_dbf100db06f844dc82ffcf14c96d36cc.pdf
    • https://static.usrfiles.com/ugd/0bcf16_7b7edb0b6f2e47159fcbe2a097eeeda2.pdf
    • https://static.usrfiles.com/ugd/6116da_3a0d4185e0a4489f9fcd675e38a56ba6.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_f22685133bd94a1dbbe4030e97648b59.pdf
    • https://static.usrfiles.com/ugd/b8c837_54e0d526506b431ab5c943c5b52a4383.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.

FilenameKindSourceSize
font_00_sfnt_off000058a5.bin
5c6cff7ba0d83d07df968bb91b90e967df58593d82a9fd1d9c61bae14faacc14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A5 5384 bytes
font_01_sfnt_off00006acb.bin
ccf7cdc094914abc7933925681540ebe72878c355e94a3e82ea47a0fe940d61c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACB 9840 bytes

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