Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6ef43fdf884110…

MALICIOUS

PDF

50.9 KB Created: 2020-08-09 19:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 586489f454d894f0b7f35c0097a31bee SHA-1: 8760fb89eb827f52e76a6d3aed52176753b10938 SHA-256: 6e6ef43fdf884110c132ff6c78d564113fd38c555a130a094780e687ba3b6d22
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which point to potentially malicious redirector infrastructure. The document body itself contains a deceptive link disguised as a timetable, which leads to a known malicious redirector. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=brts+rajkot+time+table+pdf
    • http://files.yogadansebienetre.com/uploads/1/3/1/6/131606533/sepimoliduzubup.pdf
    • http://loborevon.marketingedgecollegiatesummit.org/uploads/1/3/0/7/130775918/gebaxalu-jebisaravu-wolivezufiw.pdf
    • http://files.crevecoeurlibrary.com/uploads/1/3/1/4/131408024/9599b8a36f1.pdf
    • http://files.apologeticsinthechurch.com/uploads/1/3/1/4/131406659/xobivixisuretilak.pdf
    • http://panut.scripturesdramatized.com/uploads/1/3/1/1/131164250/6347309.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8598/6982/files/burket_s_oral_medicine_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/2212/1122/files/parinaniwotazelexefuper.pdf
    • https://cdn.shopify.com/s/files/1/0430/8094/1729/files/atmosphere_drive_amway.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7474/files/where_to_watch_ratatouille.pdf
    • https://cdn.shopify.com/s/files/1/0432/3983/3767/files/agile_project_management_with_scrum_roman_pichler.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/warexevo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6395/7909/files/58321619466.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotedijulukamani.pdf
    • https://cdn.shopify.com/s/files/1/0445/3246/5828/files/guia_turismo_bogota.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9871/files/78811240757.pdf
    • https://cdn.shopify.com/s/files/1/0437/2987/9194/files/35642431785.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/cinematography_books_in_tamil_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/wildflowers_tom_petty_chords.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_off00007d61.bin
44207d6b7083263f4c60137f54fc69c7e7fc0f29911b5026677424cc638ed984		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D61 5516 bytes
font_01_sfnt_off00009010.bin
e54a210985dcec52a451771471e9d922c53779d469cc81c7d91664b6f9dc71d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9010 14916 bytes

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