Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1822c80b96d430…

MALICIOUS

PDF

44.5 KB Created: 2020-08-31 05:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d54a28730572f54b6bf2df028e849706 SHA-1: 0f885fc1c6dc8b4b6ee9c2d43628c90c428489ef SHA-256: 7f1822c80b96d4308658f802c611a55787d5b781925548fb3b9e6d2040186e7a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a PDF link farm used for SEO manipulation. One of these links, 'https://ttraff.ru/wix?keyword=krups+coffee+grinder+gvx231+manual', is flagged as a malicious redirector. This suggests the document is designed to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

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.ru/wix?keyword=krups+coffee+grinder+gvx231+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/7966/3765/files/85313555487.pdf
    • https://cdn.shopify.com/s/files/1/0434/0809/7445/files/56223116412.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8954/files/60093720847.pdf
    • https://cdn.shopify.com/s/files/1/0463/0292/0864/files/appsc_group_2_syllabus_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84602765162.pdf
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/difference_between_void_agreement_and_void_contract.pdf
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/85875953036.pdf
    • https://static.usrfiles.com/ugd/b8c837_96b525a2971e46f187e573606558a986.pdf
    • https://static.usrfiles.com/ugd/158fb9_bfec35fb40444aef9b0ed51f69bf9444.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_f832f127a53a405ea47fd739f581a78e.pdf
    • https://static.usrfiles.com/ugd/a18aa6_fc065cc28e194fc482fcdb1680f11651.pdf
    • https://static.usrfiles.com/ugd/f515ca_dd4a904316da418ca863cd404cdaee7d.pdf
    • https://static.usrfiles.com/ugd/067ecb_96e61574894b42d5acd8f36b4d035d7d.pdf
    • https://static.usrfiles.com/ugd/b27199_998fb8b2b1a5436882f6fb0ea03e83fc.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061f8.bin
99913a545516ad97bcf664017ae4336afe07f1f5960de7325b7167da6b57389e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61F8 5720 bytes
font_01_sfnt_off00007563.bin
63f75919d80fe6bce4e85b67c9c9db2d649322109f5e1d4e5b2709dfc4eb2516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7563 9844 bytes
font_02_sfnt_off00009718.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9718 4324 bytes

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