Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e74bd13f6d88ec7…

MALICIOUS

PDF

38.3 KB Created: 2020-08-23 13:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aeb7140787f30f4b2a910a4f78b57a2f SHA-1: 55ecf23b8bf77e55e22b27787fd04f69be770ed4 SHA-256: 6e74bd13f6d88ec75b26a73f1745b0cb75e00d540be2830ec80188f4a1bcd760
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one pointing to a known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure strongly suggest an attempt to redirect users to malicious sites.

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=google+business+site+templates
    • http://logun.teganhanlon.com/uploads/1/3/0/7/130776561/8460754.pdf
    • http://files.appawse.com/uploads/1/3/1/3/131383649/bb4a18d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0454/6166/7992/files/google_spreadsheet_sumif_two_conditions.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/adaptation_of_animals_worksheet_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/27318099100.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/tozoruponuziwawu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4199/files/dragon_ball_legends_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/sojibamirejojija.pdf
    • https://cdn.shopify.com/s/files/1/0436/2518/5442/files/human_behavioural_science.pdf
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/bafazikefogalipanidina.pdf
    • https://cdn.shopify.com/s/files/1/0440/2990/2998/files/types_of_building_automation_systems.pdf
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/23452975924.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_off000059e3.bin
8bc3eea76521e3116bfa587ab7093122263194d2e641fbac351e713a545a49e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x59E3 5212 bytes
font_01_sfnt_off00006b8f.bin
48fa36d5c05638c39eaa8a3305ffc198d37d78420ed088b2d9c16023eab6f5f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8F 9704 bytes