Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a61a70b931b8df…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 00:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94a0f202748411b86d34bab2f7299fe4 SHA-1: 8c2777a225236c872bf33b2718af2b8f262b0620 SHA-256: c7a61a70b931b8dfe7c731a79a02398f73b1ce89ca941e8476a05cdcad019cf5
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for being a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=lectura+reflexiva+sobre+los+valores'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous embedded links to other PDFs hosted on Shopify. The primary intent appears to be the distribution of content through a link farm, potentially leading to malicious sites or further compromise.

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=lectura+reflexiva+sobre+los+valores
    • https://cdn.shopify.com/s/files/1/0438/4332/2016/files/92155332004.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52299098946.pdf
    • https://cdn.shopify.com/s/files/1/0433/0124/0992/files/imprimir_curp_gratis_nuevo_formato_2018.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53607129813.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/pros_and_cons_of_studying_abroad.pdf
    • https://static.usrfiles.com/ugd/07625c_04b9aaf2952b4ac5a3db2012c8d27e29.pdf
    • https://static.usrfiles.com/ugd/8b9728_a30b84e1ea9f4d45b25bd59f7798fd32.pdf
    • https://static.usrfiles.com/ugd/34e21e_27129d8932c8431796cf4fb73eace695.pdf
    • https://static.usrfiles.com/ugd/3fc21f_336706270933470496b83207db98be5d.pdf
    • https://static.usrfiles.com/ugd/0c268c_d3db54eb064e49858bfc314f75a3b23c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5d32a56242c40be9b68230ed6fa663c.pdf
    • https://cdn.shopify.com/s/files/1/0438/8729/6680/files/centrales_termoelctricas_de_biomasa_libro.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8618/files/xuzamudusogo.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_off000065bc.bin
9d228173cc08551e39ac2e098f21050743c547d272b99f3c2b2414d32e2540c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65BC 5084 bytes
font_01_sfnt_off00007722.bin
7ecd5d629c8daa58f85d042bf5dd74765792891ff13153f56ed1de751ae1e4e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7722 11080 bytes

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