Malicious PDF — malware analysis report

Static analysis result for SHA-256 e41f94334f630f02…

MALICIOUS

PDF

39.9 KB Created: 2020-08-01 01:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9aababf260e54d3e512875957ead1a10 SHA-1: 697a4b97e1450317bf0144ef7b5d857d873c5b4a SHA-256: e41f94334f630f029685a8909fe31413ae8dd91197e6e5b06bba0a93f847d904
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=mp4+to+wav'. The document body also contains this URL, suggesting it is the primary lure. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick the user into clicking a link to initiate a download.

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=mp4+to+wav
    • http://files.mitchsmanland.com/uploads/1/3/2/6/132681516/338884d3d4d.pdf
    • http://files.sugarvedelmiesmunkavedelmikft.com/uploads/1/3/0/7/130775115/tisarixemiju.pdf
    • http://files.markellscloset.com/uploads/1/3/2/7/132712451/pitikazoxoj_lekevuwegido_poledevu_gefuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8137/files/febudakedatolikarutebowat.pdf
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/wajig.pdf
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/57918492598.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/pujame.pdf
    • https://cdn.shopify.com/s/files/1/0430/7314/2933/files/gajixij.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/burrito_sabanero_piano_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/75582343093.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/68190793674.pdf
    • https://cdn.shopify.com/s/files/1/0431/0849/9618/files/53916643427.pdf
    • https://cdn.shopify.com/s/files/1/0432/0903/1840/files/gmat_math_book.pdf
    • https://cdn.shopify.com/s/files/1/0439/1324/8923/files/28609636798.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_off00005fe5.bin
e5322430d3fccb59565c027e4647a502eaed2a2933d7efa3ac42ef829fe8b23f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE5 4752 bytes
font_01_sfnt_off0000704d.bin
4a17a9dd72e19dd031bacc89e22b673fce7023f62880012803199337fcc1a87b
pdf-font-stream PDF embedded font (sfnt) at offset 0x704D 10128 bytes