Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1f9d4bf610c836…

MALICIOUS

PDF

33.6 KB Created: 2020-08-23 13:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b385f886afb3651a9cdd4c7a7017eb4 SHA-1: 1aad4f02beb89f55f58d0ec776ca9367466d5d17 SHA-256: 3e1f9d4bf610c836f2e0737d41bc586b72b14c46f7a9def304c37e1a59ceffff
120 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to its inclusion of a large number of embedded links, a technique often used to redirect users to malicious sites. The primary redirector URL is https://ttraff.com/pify?keyword=nandamuri+balakrishna+video+songs, which points to a link farm hosted on cdn.shopify.com. This suggests a campaign focused on SEO poisoning or link farming to distribute malware or conduct phishing attacks.

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/pify?keyword=nandamuri+balakrishna+video+songs
    • http://files.nicoletorbay.com/uploads/1/3/1/3/131398504/vedenuliz.pdf
    • http://files.wesparklearning.com/uploads/1/3/1/3/131383486/wufurorawi.pdf
    • http://sexuve.adventurepickle.com/uploads/1/3/1/1/131164250/tavagekifomazudepo.pdf
    • http://files.rh-rentals.com/uploads/1/3/1/4/131406800/9496159.pdf
    • http://telusiw.qksnd.com/uploads/1/3/1/4/131454012/kiniviza-meziburixenil.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/xezajej.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2230/files/80793642800.pdf
    • https://cdn.shopify.com/s/files/1/0429/3640/2079/files/mowunupevoxuwikipak.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/kokuwurufesik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6607/2994/files/51270795339.pdf
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/64702845319.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/51462825967.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/para_colorear_animales.pdf
    • https://cdn.shopify.com/s/files/1/0439/4686/8891/files/nba_basketball_court_dimensions_in_meters.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/32722193947.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_off00004633.bin
4a34e9e23dde39060fe861215db4e8175f9a4787d37ce09388b55b25ebd54b5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4633 5472 bytes
font_01_sfnt_off000058a0.bin
51580e59469a70c15e88cb332975107188d82083ae4ab5a828ca33dadb52cdaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A0 9588 bytes

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