Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc9a391d4c331ab0…

MALICIOUS

PDF

50.2 KB Created: 2020-08-25 01:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73d89892123853d040a20cde1d8466e7 SHA-1: 3abf292a369ba1108b3628f5bdb55ba05e55cfd4 SHA-256: bc9a391d4c331ab0b6d37de6c028b562f4b9cf062267ef3fdac58cded5e87778
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the link at https://ttraff.com/pify?keyword=crazy+frog+song++masstamilan is associated with malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic suggests a large number of external PDF links, many pointing to cdn.shopify.com, which is likely an attempt to manipulate search engine results or distribute content. The document body is heavily obfuscated but contains the malicious URL.

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/pify?keyword=crazy+frog+song++masstamilan
    • http://padurotut.incubator143.org/uploads/1/3/1/3/131379394/4068087.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5241/files/20176810873.pdf
    • https://cdn.shopify.com/s/files/1/0437/1916/4058/files/printable_july_2019_calendar_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/dozojopofujijifupofolawo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1421/8143/files/45593679820.pdf
    • https://cdn.shopify.com/s/files/1/0459/0010/3834/files/23715042042.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4340/files/diode_digital_logic_gates.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/52262087842.pdf
    • https://cdn.shopify.com/s/files/1/0437/6798/8376/files/xonulipik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nitupalakisotubawu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.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_off000078a1.bin
589365c35b11cddddbd768e52e4d650ca355b53b7821487b28e3afb221d23e6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A1 4932 bytes
font_01_sfnt_off00008956.bin
eedbf99627e8e42fe197e3130ccde731ea4b5dadd2b43959630e52b215573099		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8956 10688 bytes
font_02_sfnt_off0000adb6.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADB6 4324 bytes

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