Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a7ac92bed87201…

MALICIOUS

PDF

47.1 KB Created: 2020-08-08 00:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b952b8bbcf4aed5a096b5c81949367fc SHA-1: e7c9bc522d4adbde2fa67c847d6c711aa3eda65e SHA-256: 74a7ac92bed872014acc55c335ee5e3d50ff56500482d593f004e230521c9b0f
194 Risk Score

Malware Insights

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

The PDF contains embedded links, including one to a known malicious redirector, suggesting it's used to deliver a second-stage payload. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be part of a multi-stage attack involving password-protected archives. The ML classifier strongly flags this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/pify?keyword=que+es+un+plan+de+marketing+digital+pdf
    • http://files.playful-pedagogy.org/uploads/1/3/1/4/131454500/likug.pdf
    • http://files.calgarykarate.net/uploads/1/3/1/4/131406082/fuzakubopukogawovaku.pdf
    • http://files.mertoncatholics.org.uk/uploads/1/3/0/8/130874296/lutup_xokolefivo_nomufovixok.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7718/0328/files/32488531180.pdf
    • https://cdn.shopify.com/s/files/1/0437/7490/2423/files/update_branch_from_master.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/que_es_el_balanced_scorecard.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/bank_po_exam_pattern_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3021/files/92027823485.pdf
    • https://cdn.shopify.com/s/files/1/0438/9958/4680/files/29285674118.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97428896976.pdf
    • https://cdn.shopify.com/s/files/1/0428/7270/1095/files/area_and_perimeter_formulas_for_all_shapes.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5102/files/pebobunekuzuxamivufisem.pdf
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/boyka_o_imbat_c3_advel_cover.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/nadaleki.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/muserirejakovu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2331/6630/files/oxford_dictionary_english_to_urdu_free_download_2020.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_off000074d5.bin
bf46badec5c5f79e356aaa8067cad31b5aaee8fb98777500d94a6cdcb2df1e32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D5 5488 bytes
font_01_sfnt_off00008769.bin
a93de13127ed6865810505548547019e3d5c51c24a867b510507341b7eb03acb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8769 11724 bytes

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