Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa5f366460ba198…

MALICIOUS

PDF

53.2 KB Created: 2020-09-01 02:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96713211712c2d0b324fa22481cb22e6 SHA-1: 877b361345afdf3f146c7e395776574f3f5d73ff SHA-256: 9aa5f366460ba19853442b6fa72fdd0924fbfe465dfa7627adf4453478b40a3b
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=hinge+theorem+practice+worksheet'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0434/3506,5505/files/21395331608.pdf'. The document body, though heavily obfuscated, contains text related to a 'Hinge theorem practice worksheet', suggesting a lure to disguise malicious intent. No scripts were extracted from this sample.

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=hinge+theorem+practice+worksheet
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/21395331608.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojedeteremedadedarovir.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/61354139207.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/xiduvurujojizutukisaler.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5676577217.pdf
    • https://cdn.shopify.com/s/files/1/0430/6993/1673/files/pozozevovoritavosegofa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/90832875382.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/nolubefosotisebutavil.pdf
    • https://cdn.shopify.com/s/files/1/0433/4937/7192/files/funilararazaxiriwinatunaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/kubernetes_interview_questions_and_answers_for_experienced.pdf
    • https://cdn.shopify.com/s/files/1/0431/8593/0389/files/bamolofo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/kijexefulenivanif.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/38223472931.pdf
    • https://cdn.shopify.com/s/files/1/0435/5221/1099/files/application_layer_in_computer_networks.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068ac.bin
672b513c149116f67827e5ed187fa9a3c15fe7d4b2d7d525f2006917195b1a24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68AC 6588 bytes
font_01_sfnt_off00007901.bin
5ff09f5bdb46668920ee479a97f39ce7d330822abaf9664619270aa6e90c24ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7901 5432 bytes
font_02_sfnt_off00008b65.bin
801eb84b59cc32b6406c77332b8c3eecb334d35549630845f67aa6aaf95f4d9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B65 11120 bytes
font_03_sfnt_off0000b1d2.bin
856de5f921b2275f94bb5a41338b59180d98db413b929f334d16fa886bb36b0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D2 16192 bytes

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