Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4cb02fb215881c4…

MALICIOUS

PDF

32.7 KB Created: 2020-08-04 01:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98edaf131460db36caadc50789203294 SHA-1: fb890d220c0060292de4cd341e60ce572d178929 SHA-256: a4cb02fb215881c42abef6313cdbc1e62b805084a19637d5b6fab31bddce377b
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body contains a call-to-action phrase, suggesting a lure to click the malicious link. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploitation.

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/pify?keyword=pasar+de+pdf+a+word+gratis+y+rapido
    • http://files.hadleytownshipchamber.org/uploads/1/3/0/7/130739039/datidis.pdf
    • http://wagifat.nerdlebanon.com/uploads/1/3/2/7/132740900/8799406.pdf
    • http://files.lasttimetheywon.com/uploads/1/3/0/9/130969057/gixubo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/vobake.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68513135127.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/72772873013.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.pdf
    • https://cdn.shopify.com/s/files/1/0436/5749/4693/files/hit_that_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0436/3943/9510/files/62416883852.pdf
    • https://cdn.shopify.com/s/files/1/0435/9448/1823/files/33831020392.pdf
    • https://cdn.shopify.com/s/files/1/0433/5091/7269/files/character_reference_letter_sample.pdf
    • https://cdn.shopify.com/s/files/1/0435/6915/2159/files/38795094757.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/66805070523.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_off000042f3.bin
6942a671d3fbf4c69d80b3c896f3a6ab2116be5e6bf5b8514203d43c6d94320a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42F3 5372 bytes
font_01_sfnt_off00005562.bin
5185e5b54f3fccdb1eb51b9bafcba1ba9f829e35f9b5bee3e387a3a0c5a90131		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5562 9688 bytes

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