Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8d406f43799161f…

MALICIOUS

PDF

47.4 KB Created: 2020-08-14 21:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c9e33a80921643ef7963d9c21364642 SHA-1: 65562bc353e74e7f2758455bf00f3385837c70aa SHA-256: f8d406f43799161f2d7a4bb24a84ae116f3e43f63074ee1a3a6af0a6e4872139
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a significant number pointing to a link farm hosted on cdn.shopify.com, suggesting an attempt at SEO manipulation or traffic redirection. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.ru/pify?keyword=milk+cake+recipe+video. While the document body mentions 'milk cake recipe video', this appears to be a lure to disguise the malicious intent of the embedded links. No scripts were extracted from this sample.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/pify?keyword=milk+cake+recipe+video
    • http://files.baroverbar.com/uploads/1/3/1/8/131856602/fosuvujevu-xolebumepaze-meromexiges-dodetimazepivod.pdf
    • http://files.azpattersonedu.com/uploads/1/3/2/7/132740814/fowidedizomevosar.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/norm_cdf_vs.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4530/files/53276248061.pdf
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/teacher_agreement_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/stephanie_mcmahon_2000.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xaxigeruver.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sivezijikok.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6653/files/beginning_algebra_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0451/0469/3400/files/rutibetiso.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/35138949940.pdf
    • https://cdn.shopify.com/s/files/1/0441/3734/9272/files/95248246355.pdf
    • https://cdn.shopify.com/s/files/1/0437/7837/5831/files/nawuxakeluw.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7472/files/98433529907.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/woxovizijuxud.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/54353426248.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/latimifakojakono.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006397.bin
044158b18eea2b1932bd39232a16bf16545bfe0348b0e058f7addd43b8a9b51f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6397 5020 bytes
font_01_sfnt_off000074b8.bin
c42118b51b061dffbc196cd4866a2cf76d9f31ae9d0a8f6c06e6ad224a677b24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B8 2328 bytes
font_02_sfnt_off00007f70.bin
e636aa9b668b97da92e4e7d77d4075a11b7251a1fbf854d0abf6718480ef6a68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F70 10188 bytes
font_03_sfnt_off0000a27d.bin
476cc45f7310047e42566a17f0b14344d0e494d0f5f17c4f044cc8225571f79f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA27D 3440 bytes

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