Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7b13d1f672740d…

MALICIOUS

PDF

68.7 KB Created: 2020-08-12 00:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f8a66fc475578cb92244ff3276f3a6a SHA-1: 72d98189bc3bdb8a1f1de008934d07746e848219 SHA-256: 3d7b13d1f672740d32e7bcee8c91a386b649068ee67eea06026db95250c94e53
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was identified as malicious due to the presence of numerous embedded links. One critical heuristic firing indicates a PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ttraff.ru/pify?keyword=supportive+model+of+organizational+behavior+pdf', which is a known malicious redirector. Another critical heuristic, PDF_SEO_LINK_FARM, highlights a large number of external PDF links, with 'https://cdn.shopify.com/s/files/1/0428/7909/0855/files/28731917342.pdf' being the first identified. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, suggesting an attempt to lure users to a harmful site.

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.ru/pify?keyword=supportive+model+of+organizational+behavior+pdf
    • http://files.sthenrywarrior.org/uploads/1/3/2/6/132695200/luxapogusumes.pdf
    • http://files.heartconnectimproveyourlife.com/uploads/1/3/1/4/131438121/panuvusitanip_sewuvulosegogif_dufajewukag_xadovuladanag.pdf
    • http://files.okvhpa.org/uploads/1/3/2/7/132740424/fenujevefupe-rerovu-kabosugafadef.pdf
    • http://files.colorfulkauai.com/uploads/1/3/1/6/131606563/zojigagorobuge.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/28731917342.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7776/files/83826192160.pdf
    • https://cdn.shopify.com/s/files/1/0438/2323/5234/files/merge_sort_linked_list_c.pdf
    • https://cdn.shopify.com/s/files/1/0437/6290/9335/files/dewibenajarelawupexiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/4329/8207/files/sesugilow.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8994/files/bomarenoboduzosesozo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0622/0697/files/erosive_lichen_planus.pdf
    • https://cdn.shopify.com/s/files/1/0431/5113/0785/files/540110787.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5137558887.pdf
    • https://cdn.shopify.com/s/files/1/0428/7214/4038/files/59297855828.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_off0000ce3b.bin
f6709ea99e7593b98dd9d2ba4278e97fa009c43ad02714391deab5fe21a495ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3B 5632 bytes
font_01_sfnt_off0000e143.bin
1e544fcb4b707dd18d6ae6174357e31900dbd72ce0b73e54f2ca798267aff1a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE143 10616 bytes

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