Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf617013f8a4da27…

MALICIOUS

PDF

38.3 KB Created: 2020-07-29 17:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b3dc027b34c3acbb52f21f4fd09e413 SHA-1: 6387ee8a1c2e0cbe89b6739b24eefcde036d597b SHA-256: cf617013f8a4da27ae6e5ab7db9dbba1625f1d11a2c1978c60c0e6423a2c6eb7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links points to a known malicious redirector infrastructure. The document body is largely unreadable binary data, but the presence of numerous external links suggests a malicious intent, possibly for SEO manipulation or to lead users to harmful sites.

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.cc/pify?keyword=libertango+accordion+sheet+music+pdf
    • http://files.cubcountry.org/uploads/1/3/1/4/131438392/7344747.pdf
    • http://files.aspie.com/uploads/1/3/0/7/130775557/zidarudul.pdf
    • http://files.forestcobbler.co.uk/uploads/1/3/1/0/131069832/038f09a93032.pdf
    • http://files.triciavanoostveen.com/uploads/1/3/0/7/130740586/3862902.pdf
    • http://files.pentictonnewcomers.com/uploads/1/3/0/7/130775108/bbd427d5a98f7.pdf
    • http://files.aspie.com/uploads/1/3/0/7/130775557/zidaru
    • https://cdn.shopify.com/s/files/1/0438/4597/6224/files/voliwuxativasibetaxexej.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/fatilirotamefux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43396058945.pdf
    • https://cdn.shopify.com/s/files/1/0438/9172/0347/files/josesobajunejotonev.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/28702980808.pdf
    • https://cdn.shopify.com/s/files/1/0431/9114/0509/files/86600629036.pdf
    • https://cdn.shopify.com/s/files/1/0429/3489/4755/files/36605415592.pdf
    • https://cdn.shopify.com/s/files/1/0434/0898/2165/files/zipujuruliluxetafo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/49936654231.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/36233565881.pdf
    • https://cdn.shopify.com/s/files/1/0434/0845/7877/files/badiranezafadilogux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tokon.pdf
    • https://cdn.shopify.com/s/files/1/0437/5330/8314/files/kedolitonuxis.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_off000058e0.bin
d0c4dfd9c8d3cb2d85b68938151235fe1d8dc9fce16ccc910b2f405bd8669812		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58E0 5500 bytes
font_01_sfnt_off00006b5c.bin
e99d61959d4e28228210245f4c1321772af60370edbf438ea918f733d5e1f019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5C 9384 bytes

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