Malicious PDF — malware analysis report

Static analysis result for SHA-256 214a82c87035bf5c…

MALICIOUS

PDF

42.2 KB Created: 2020-08-31 10:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b144201890d88694f531fd384f88d084 SHA-1: 4cec22274f508120170200a6d15a7ee4ee95b8c9 SHA-256: 214a82c87035bf5c1afbd63a5bc12574afd8620b2cdcd1e854d28b6b2ebe2ab1
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'resignation letter sample' and the malicious URL, suggesting a social engineering lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning attempt to drive traffic to malicious sites.

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.com/wix?keyword=resignation+letter+sample+with+reason+better+opportunity
    • https://static.usrfiles.com/ugd/c162b3_a9255173cb324bf7ab700c5875696601.pdf
    • https://static.usrfiles.com/ugd/60933b_49c7fa51ef7241649c17fa1ec6d7c7e9.pdf
    • https://static.usrfiles.com/ugd/735424_ab9c7d35912d4de4b85b635787a42357.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/bemazisasaxotesidigozij.pdf
    • https://cdn.shopify.com/s/files/1/0429/1294/0188/files/11455100603.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/98616121385.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5757/files/rudram_chamakam_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6019/8557/files/92927889364.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/95492031191.pdf
    • https://cdn.shopify.com/s/files/1/0461/0942/5828/files/amenhotep_fils_de_hapou.pdf
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/28047537830.pdf
    • https://cdn.shopify.com/s/files/1/0430/8094/1721/files/71876567949.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7808/files/37278783627.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/dananubuguzenumeraweguni.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_off000065d2.bin
ec24b9cd0aad0bd37041e5890bb911f902d317b227892cd7234f4b7417129df7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D2 5572 bytes
font_01_sfnt_off000078b3.bin
2dabbb48ba01148a0cc3faff9bf3ee626ed76c6838d26a8eae6f655f6ae652c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B3 10176 bytes

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