Malicious PDF — malware analysis report

Static analysis result for SHA-256 2759697d0182f9a7…

MALICIOUS

PDF

43.1 KB Created: 2020-08-14 17:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 290a45c4a815ad75379bc13c2edf6807 SHA-1: 0bf2ac4cac2768340099caab12e4b07fbfe16913 SHA-256: 2759697d0182f9a74d002ee9fc3078d38903e6fa3800106ce1034bab06317959
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=gacha+life+coloring+sheet', suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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.com/pify?keyword=gacha+life+coloring+sheet
    • http://datako.selplasticpallet.com/uploads/1/3/0/8/130814729/furun.pdf
    • http://vovuje.ackgs.com/uploads/1/3/1/8/131856772/a187a878d313.pdf
    • http://files.geckoboa.com/uploads/1/3/1/6/131637169/f97db3ee7ebf0.pdf
    • http://files.vanderphotography.com/uploads/1/3/1/4/131409090/gomes-josusik-jigevifikek.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8364/files/worthy_of_it_all_chords.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/babuwezifobaritixugakow.pdf
    • https://cdn.shopify.com/s/files/1/0436/1102/9667/files/51973928358.pdf
    • https://cdn.shopify.com/s/files/1/0434/5951/0424/files/22360822288.pdf
    • https://cdn.shopify.com/s/files/1/0435/7668/8798/files/83835549913.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/5310698063.pdf
    • https://cdn.shopify.com/s/files/1/0437/7441/0901/files/gimavewojin.pdf
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/zasusovadifigadubejejabim.pdf
    • https://cdn.shopify.com/s/files/1/0433/8089/9989/files/56541175896.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0497/files/dokek.pdf
    • https://cdn.shopify.com/s/files/1/0432/8734/7360/files/tidevanupakefu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/68081829440.pdf
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/71981217199.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/gixesajug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0160/1444/files/weather_moscow_id.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_off000063b0.bin
a778483ef89920a6dc656a5157351da48884479fa8b3bcf77d0fc4c6f1791451		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B0 5176 bytes
font_01_sfnt_off0000754a.bin
38b5e636810498e6253be1980f82190178a44970bdbd3e0f512042fba3b0d4ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754A 13500 bytes

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