Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cad176482ad9770…

MALICIOUS

PDF

40.2 KB Created: 2020-08-03 14:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95d54a02aeee384d545ab8bb156bdcfd SHA-1: 1d513d982b34f3398854af42bf96c7c90072b012 SHA-256: 7cad176482ad97704315c1a366eecf5e524cda363026d786b2f1e968b53d95f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a significant number of embedded links, many pointing to external PDF files hosted on various domains. One URL, 'https://ttraff.ru/pify?keyword=calendario+lunar+2020+mexico+pdf', is flagged as a malicious redirector. The presence of a link farm and a malicious redirector suggests an attempt to manipulate search engine results or distribute malicious content, aligning with a spearphishing attachment attack vector.

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.ru/pify?keyword=calendario+lunar+2020+mexico+pdf
    • http://wofina.tuckantugs.com/uploads/1/3/0/8/130813765/jukorosiliw-neripevajej-mowugag-vubaxa.pdf
    • http://files.myvegandish.com/uploads/1/3/1/4/131483053/944dc6cf3a4c.pdf
    • http://files.madisonavebaptist.org/uploads/1/3/0/7/130738710/2715868.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5834/8700/files/42520843528.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/gitisizetazogazetig.pdf
    • https://cdn.shopify.com/s/files/1/0440/0198/4662/files/91441918535.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/dexiwewanajavatifaparig.pdf
    • https://cdn.shopify.com/s/files/1/0432/8652/8164/files/breath_of_fire_4_iso.pdf
    • https://cdn.shopify.com/s/files/1/0437/5438/9665/files/kasutizisijosazisexoje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69901941500.pdf
    • https://cdn.shopify.com/s/files/1/0436/8944/3483/files/lilikoxol.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/liriwudiporosisuvuti.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/84609464813.pdf
    • https://cdn.shopify.com/s/files/1/0434/2831/5293/files/sexovofemibugafukapa.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/xediwojorunagurojedizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6284/files/47349504084.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_off00005d19.bin
ff471b56cdd9b5a1b72aee8c23b070798291622f763ae81edac5a26eeafe0d8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D19 5372 bytes
font_01_sfnt_off00006f46.bin
fb7854458f2db6236bd5f095c3ac3375ed76badd2e0a703bfa522b11e25158d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F46 10984 bytes

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