Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd64d3e96ccc002…

MALICIOUS

PDF

44.7 KB Created: 2020-08-14 11:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36f8cb38a281977c2e3994ee146238f7 SHA-1: 30374f41bef947768da24cfebb8dc2ed46332f9b SHA-256: ecd64d3e96ccc00264dccfaf3bfd4056cd1160a3d2c190424527b77e9805ebb7
152 Risk Score

Malware Insights

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

The PDF contains a lure for a 'template consulting contract' and embeds numerous links. One critical heuristic indicates the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=template+consulting+contract'. Another heuristic flags it as a PDF link farm, with many links pointing to Shopify domains, likely for obfuscation. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=template+consulting+contract
    • http://togudo.ruthsswimschool.com/uploads/1/3/0/8/130814017/0c055e1d36.pdf
    • http://files.edithbp.com/uploads/1/3/1/4/131482941/xidosofolinigisetot.pdf
    • http://files.thurlingguitars.com/uploads/1/3/0/8/130814101/fupibizavuvoneton.pdf
    • http://files.lorainedavies.com/uploads/1/3/0/8/130814644/povutameseboji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/tolar.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7654/files/25388055003.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6124/files/resobu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/xeromufolo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/72751457882.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3031/files/how_to_read_a_file_c.pdf
    • https://cdn.shopify.com/s/files/1/0435/9746/3715/files/bolt_size_and_spanner_size_chart.pdf
    • https://cdn.shopify.com/s/files/1/0431/1587/2423/files/24425263753.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/higher_engineering_mathematics_by_bv_ramana_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.pdf
    • https://cdn.shopify.com/s/files/1/0435/6617/0271/files/dekopovifuk.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_off000065bc.bin
be7d4bded2192b0319fb00d09f113e0fc9f4bfad935450c9858d4bd68df77826		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65BC 5084 bytes
font_01_sfnt_off000076e4.bin
24205e5771f787983bae016ffed3b97468f51781a9189c581cc86dee4d261a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E4 9664 bytes
font_02_sfnt_off000097f8.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97F8 4324 bytes

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