Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1cf8bee3435b476…

MALICIOUS

PDF

47.3 KB Created: 2020-08-30 17:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bac329c1874295d3781fe39693ab6d7 SHA-1: 7504bb805697b66c3ab95c685a1421ef58c23e00 SHA-256: c1cf8bee3435b4761e315fbc477b6dd1304d7df507ad9e3ed46d73de932817cf
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm or SEO manipulation tactic, embedding numerous links to external PDF files. One of these links, 'https://ttraff.com/wix?keyword=amy+bunger+stitch+guide', is identified as a known malicious redirector. The presence of this malicious link and the sheer volume of external links suggest an attempt to drive traffic to malicious infrastructure or manipulate search engine results, rather than deliver a direct payload.

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.com/wix?keyword=amy+bunger+stitch+guide
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/81660406032.pdf
    • https://cdn.shopify.com/s/files/1/0438/6773/4176/files/wasipekowexadotubepidaki.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/92416411151.pdf
    • https://cdn.shopify.com/s/files/1/0429/2381/9164/files/keystone_motel_steven_universe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6957/0198/files/amazing_spider_game_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/boxhead_the_rooms.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/opera_hotel_software.pdf
    • https://cdn.shopify.com/s/files/1/0434/5298/9605/files/to_detect_the_presence_of_adulterants_in_sugar.pdf
    • https://static.usrfiles.com/ugd/4cf28d_d6c94a0615204007b6d5630966e288b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_15e2403becef4676ae52a0c0f743d93c.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nalekubaserigudopen.pdf
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/30315420174.pdf
    • https://cdn.shopify.com/s/files/1/0434/1796/0600/files/75556400290.pdf
    • https://cdn.shopify.com/s/files/1/0439/1727/9400/files/alert_message_in_android_studio.pdf
    • https://cdn.shopify.com/s/files/1/0430/6072/3865/files/386_country_code.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_off00007aeb.bin
a16176789b4e3a3dd61a03fdae179b2ed77e4842a737b9a0b2e21c69ff7f0fc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEB 5340 bytes
font_01_sfnt_off00008cec.bin
701a10626d2753cb060d866c61c1a962aa36963a39f8fe233e1cb93a8079a21b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CEC 10364 bytes

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