Malicious PDF — malware analysis report

Static analysis result for SHA-256 a39e1fd58449b30b…

MALICIOUS

PDF

71.1 KB Created: 2020-09-20 01:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a266284895661a1cd1d2db1a88fac19e SHA-1: c9f36022d728e980c4afffd03cd5f6c45d33725e SHA-256: a39e1fd58449b30b98934be0fc2f212fa6579f205e32849d438b9af9833bf5a5
150 Risk Score

Malware Insights

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

The PDF document was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm. The primary malicious URL identified is https://ttraff.com/wix?keyword=the+american+journey+pdf+chapter+13, which is likely used to lure victims. The document body contains garbled text and references to wkhtmltopdf, indicating it was likely generated programmatically to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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.com/wix?keyword=the+american+journey+pdf+chapter+13
    • https://5f86bfd3-d0fd-46b0-97e2-04289c5fc403.filesusr.com/ugd/21e6f2_8b4017b916564b44b1dd7edd2669e81b.pdf?index=true
    • https://41c9e067-bd4a-4eb6-9634-f5b2a141bcac.filesusr.com/ugd/03f576_e52da163871b43508d1949a3522cda94.pdf?index=true
    • https://13c64997-abb1-437c-a4c1-fa156eeffb8b.filesusr.com/ugd/ca847e_ef31fa6178bb4eaeba79ca6c7d20193d.pdf?index=true
    • https://dbcc866b-7bf9-4499-aa41-6024c41303b1.filesusr.com/ugd/e2c6c1_c7545b93aa284ca1bae23f825ab08b18.pdf?index=true
    • https://e5d1f236-3ddc-4d24-8536-e6c9d5da6fb9.filesusr.com/ugd/e6e573_7f7f3b0ad3064d5f9b856eb0cb7b6db2.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/wastewater_treatment_in_beverage_industry.pdf
    • https://cdn.shopify.com/s/files/1/0432/6070/6971/files/hunters_creek_middle_school_website.pdf
    • https://cdn.shopify.com/s/files/1/0433/6078/0443/files/43230956655.pdf
    • https://cdn.shopify.com/s/files/1/0462/5996/2007/files/engineering_basis_of_estimate_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/high_school_ap_physics_1_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/3888/4519/files/wewajudevim.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/concepto_de_texto_argumentativo.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/
    • https://cdn.shopify.com/s/files/1/0462/5996/2007/files/engineering_basis_of_e

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a71.bin
ba137df2375e8235288cd4aeeace746721b35d1fad2c055fa75600378f59c9c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A71 5648 bytes
font_01_sfnt_off00007e29.bin
fe845a3c710b26247e4b3e5974a43543b68cbedc48a25f0d9a7217859ced8e51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E29 5408 bytes
font_02_sfnt_off00009071.bin
25be7f4b297a9979d316270df6664b6bb37094fcd8d94f859f0e10b900cd7820		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9071 3220 bytes
font_03_sfnt_off00009d81.bin
99942306d53cb4a66c28830925ca324fa189cbf37976255c5e4aea6e741bf77a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D81 4804 bytes
font_04_sfnt_off0000ad17.bin
6da32e37e8af6074577802958648f70411a08a62b88f7de27d82536d916744b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD17 12520 bytes
font_05_sfnt_off0000d724.bin
2a093fe126f08ea49cbb09ee6214704a04cdc36efa9c14e6b18ae0ea609b7597		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD724 16716 bytes
font_06_sfnt_off0000ee7a.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7A 4324 bytes
font_07_sfnt_off0000fc7b.bin
6497729e1177225d5cd2ae80446b1c393cddfac73b92287920ca5c3ee94fd50b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7B 3744 bytes

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