Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d400690a5afb56…

MALICIOUS

PDF

38.6 KB Created: 2020-07-11 03:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cd04f8baef549885d70f6e55c154501 SHA-1: 94134d5de96c56bb7fc85eca354d5232604d1a49 SHA-256: a3d400690a5afb56191c760d8027d9c01d4e8456da190e6e7dea7fe81934142b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=pert+practice+test+algebra+1+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Pert practice test algebra 1 pdf', suggesting a lure to disguise the malicious link farm.

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.ru/pify?keyword=pert+practice+test+algebra+1+pdf
    • http://files.scenealongtheway.com/uploads/1/3/0/7/130775633/vubuwaxazaze.pdf
    • http://files.ssfitnesstraining.com/uploads/1/3/0/8/130874564/lariraraw_letavapetojewa_safujigefumabe_mamiloge.pdf
    • http://files.marriedmarks.com/uploads/1/3/2/8/132816158/wawezanuz-titun-resuta-ponupax.pdf
    • http://files.carlosboix.com/uploads/1/3/0/7/130739311/pujuf_biweda_rikijujat.pdf
    • http://files.fjsac.org/uploads/1/3/1/6/131606395/lagisaf.pdf
    • http://files.paintfactory.co.nz/uploads/1/3/1/4/131454304/ee11dd7.pdf
    • http://files.policetrailer.com/uploads/1/3/1/4/131407010/fotimizon.pdf
    • https://bedurezagofu.files.wordpress.com/2020/06/5158966810.pdf
    • https://fegiduv.files.wordpress.com/2020/06/bapanole.pdf
    • https://dedovirap.files.wordpress.com/2020/06/42939700263.pdf
    • https://zezisid.files.wordpress.com/2020/06/zatugafamogajude.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/sudin.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/nuxiweluwokovolemowuzajuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rinajimakonewob.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/dafofonumexalowid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70945418412.pdf
    • https://cdn.shopify.com/s/files/1/0430/5243/3557/files/lesefebimusadiku.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_off00005ab9.bin
e503d3e5ca68866a2211de794b687d88a454f2bb056caed8df4d80589626e7aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB9 5088 bytes
font_01_sfnt_off00006c0d.bin
02ae45066b5a9005a0236096df062847993c4442b1958257a031acc2d37aabc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0D 9820 bytes

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