Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf4e55871d37184…

MALICIOUS

PDF

53.6 KB Created: 2020-07-27 15:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 560b0d6d33e9f8acccb195c70c78c15b SHA-1: 3bad428d48af8467f67fa12fbf4a8dc93885e982 SHA-256: 1cf4e55871d37184d9b5da642f8f8a9b8ccfe9ea99ca49612565ca08567bc45e
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.003 Windows Command Shell T1059.001 PowerShell

The PDF contains a malicious redirector link, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. It also features a link farm, suggesting SEO poisoning tactics. The document body, though heavily obfuscated, contains text related to 'Google sheets api php tutorial', likely a lure. The heuristics indicate the document attempts to trick the user into executing commands or providing MFA codes, consistent with phishing or credential harvesting.

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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=google+sheets+api+php+tutorial
    • http://files.cropwalkforsyth.org/uploads/1/3/1/0/131069819/nugozesavojuvat-kosofa-vavamuv.pdf
    • http://files.andylamont.com.au/uploads/1/3/2/6/132696263/5026528.pdf
    • http://files.thesaltandlightacademy.com/uploads/1/3/0/8/130814229/7120781.pdf
    • http://files.henrikbechseeberg.com/uploads/1/3/1/1/131163578/supaj-rutubiforol.pdf
    • http://files.theprincesscryaries.com/uploads/1/3/0/9/130969710/4700470.pdf
    • http://files.thepr
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/14067123391.pdf
    • https://cdn.shopify.com/s/files/1/0434/7052/0470/files/44717180913.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jatud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84302935330.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vinujavezo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/27102204993.pdf
    • https://cdn.shopify.com/s/files/1/0438/3608/0285/files/90039211892.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdf
    • https://cdn.shopify.com/s/files/1/0432/1653/5720/files/biribexobibesinewobikox.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/82030439235.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/mutum.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/bosivitugadifiruvegim.pdf
    • https://cdn.shopify.com/s/files/1/0438/0003/5485/files/soseguv.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_off00008593.bin
85f96eb7853b67e5970b192067a4a33f9b5009a8e606a62f0d2084b520ebfc93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8593 4888 bytes
font_01_sfnt_off00009657.bin
0cd7502993ff2eb1e27a4de22ccef01011929fbd72399c2cb24a9e3e6177b408		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9657 16356 bytes

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