Malicious PDF — malware analysis report

Static analysis result for SHA-256 d911ac202b28c4e9…

MALICIOUS

PDF

46.1 KB Created: 2020-09-07 11:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8f78ab4fe7a435630935869ec6c6d92 SHA-1: af565422c7089584ee544304b2c3795093abbfbd SHA-256: d911ac202b28c4e9f49f3abfc07e5b519778f9337d6c64aade127d017f5464d2
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=avenza+maps+pro+mod+apk'. This URL is presented within the document body, disguised as a download for 'Avenza maps pro mod apk'. The PDF also contains a large number of embedded links, characteristic of SEO spam or link farms, further indicating a malicious intent to drive traffic to external sites. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=avenza+maps+pro+mod+apk
    • https://static.usrfiles.com/ugd/f2ef67_5359c9454efa4d71979df6ea670f8e3e.pdf
    • https://static.usrfiles.com/ugd/2f8cea_2af781e4d322495b925b074d7c8e5feb.pdf
    • https://static.usrfiles.com/ugd/6116da_f3fa19f16f684c5ca86e3e46ae6648e9.pdf
    • https://static.usrfiles.com/ugd/9d869b_42f8392f6e7f427d8b11724331d5cfd1.pdf
    • https://static.usrfiles.com/ugd/e23fbb_5350969c46e043239cd33461bce3ea32.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8359/files/good_receipt_report_in_sap.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4021/files/microsoft_word_label_template_21_per_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/9739/1261/files/1074851214.pdf
    • https://cdn.shopify.com/s/files/1/0435/1046/4667/files/architecture_of_computer_systems.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/types_of_friction_worksheet_middle_school.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_cc5d91186f16485bbcd1d076e2bb71fc.pdf
    • https://static.usrfiles.com/ugd/96768c_446477f7e0ae47f0844dd491f013d326.pdf
    • https://cdn.shopify.com/s/files/1/0437/9312/1442/files/battlefield_4_trainer_free_pc.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78476378890.pdf
    • https://cdn.shopify.com/s/files/1/0430/8559/4775/files/wawuwumarugivox.pdf
    • https://cdn.shopify.com/s/files/1/0437/1959/0040/files/18734818754.pdf
    • https://cdn.shopify.com/s/files/1/0441/2204/6616/files/adblock_plus_edge.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006812.bin
2191e02e0ef9fcfc9794aa2bc2b16b71d97fb6db9d441d4110f8ebdf98b8f62f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6812 4896 bytes
font_01_sfnt_off00007893.bin
797a1da83e33cdc6e52e22fdec271de96119cb41d9a354708486508a23a6cfe4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7893 10752 bytes
font_02_sfnt_off00009d69.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D69 4324 bytes