Malicious PDF — malware analysis report

Static analysis result for SHA-256 935a639553f5bab2…

MALICIOUS

PDF

43.7 KB Created: 2020-08-18 23:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 910f1c3e9b5c6b83e96b01caf721d136 SHA-1: 2ca6235055e2b6324b28ca66baec491729f1749f SHA-256: 935a639553f5bab21b527cd9c7ed684840131550fc9b58c0260400b66901f170
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=idioms+analogies+metaphors+and+similes+worksheet', is designed to lure users to malicious content. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to benign Shopify domains, but at least one other unknown domain. The primary malicious intent appears to be directing users to the ttraff.cc redirector.

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.cc/pify?keyword=idioms+analogies+metaphors+and+similes+worksheet
    • http://petuli.dcroyalty.com/uploads/1/3/2/6/132680813/roxiga.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/isuzu_npr_labor_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/wurum.pdf
    • https://cdn.shopify.com/s/files/1/0431/7095/5415/files/fagunato.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/jupaxagebakijud.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/abbyy_transformer_12._0_serial.pdf
    • https://cdn.shopify.com/s/files/1/0434/7609/1046/files/les_accords_jazz_au_piano.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7414/files/54178127718.pdf
    • https://cdn.shopify.com/s/files/1/0435/0646/6975/files/gauge_to_mm2.pdf
    • https://cdn.shopify.com/s/files/1/0432/2295/8248/files/wanabewuzetapovipujiv.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_off00005fd0.bin
6f9c3a704e2bffda61bcd922d1aba0df4c1fc62dfc382e213037df979ecf6ebd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD0 5252 bytes
font_01_sfnt_off0000718a.bin
dbe2e5197adbd8dc19f11783ddb3febf796f156d1cd413916c98e769e2b318de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718A 10040 bytes
font_02_sfnt_off000093d8.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93D8 4324 bytes

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