Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cf2c59d4f30f5d…

MALICIOUS

PDF

41.0 KB Created: 2020-09-01 19:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47e289b22e8b54a2a114da5890efdec5 SHA-1: be1b57c46a85d3b396aaa5e82d6b1d7bb2cbb097 SHA-256: 08cf2c59d4f30f5df0d033cb99f12ba044b0198bdd699e969b708404f3399653
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, including one to a known malicious redirector at ttraff.com. The document body, though partially obfuscated, suggests an attempt to disguise malicious links as educational content. The presence of a link farm and a critical redirector alert strongly indicate a phishing or redirection attack.

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/wix?keyword=adding+and+subtracting+worksheets+grade+1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/56046691556.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/broken_winged_crane.pdf
    • https://cdn.shopify.com/s/files/1/0433/9489/1943/files/free_printable_weekly_chore_chart_templates.pdf
    • https://cdn.shopify.com/s/files/1/0462/7175/8485/files/56565247688.pdf
    • https://cdn.shopify.com/s/files/1/0462/6428/7381/files/vejoloxibej.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1969/files/45481498939.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89709194360.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/kipimexedonuki.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_0a6302c492e84103901338435ce96761.pdf
    • https://static.usrfiles.com/ugd/fb5067_18629faf857445848caaa119c1729a15.pdf
    • https://static.usrfiles.com/ugd/96bf9d_6da649c9cfca4cc3a16b439cfaf9b0c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_cafbaa95d8724e1cbb564a3883c79c92.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zimupumunilojoduwa.pdf
    • https://cdn.shopify.com/s/files/1/0440/1420/7134/files/a_survey_of_east_african_history.pdf
    • https://cdn.shopify.com/s/files/1/0433/6897/2444/files/25313175475.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/leccion_7_contextos_logico_o_ilogico.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/lagu_bungou_stray_dogs_season_2.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006236.bin
236307b8963addab586374c10c81578985b9e71ceac23a1c3b3cfbf8f00739c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6236 5504 bytes
font_01_sfnt_off00007502.bin
0d046e9c5a2f4e210554dcd9c4db6260a9d984033a52a41945c7f615d76ff401		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7502 9788 bytes

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