Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0c1f9e6a530605…

MALICIOUS

PDF

46.2 KB Created: 2020-08-10 20:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0546121b0b0a27a3a46ef4f0649bfa5 SHA-1: 25262cf28d24d1ff21a02e8b7b86cff0a1afb76d SHA-256: 0d0c1f9e6a530605ef43d7fa7ca4b1be9ed8c9a9202295a680a39ca92b08e87a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. One of these links directs to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=risk+assessment+matrix+pdf
    • http://kuganegat.uwincoach.com/uploads/1/3/1/6/131606289/5191321.pdf
    • http://wafutata.dirtbagshop.com/uploads/1/3/1/1/131163930/275068.pdf
    • http://galewuv.photonicpharma.com/uploads/1/3/1/3/131379312/lapum_menojebamujozaf.pdf
    • http://files.jenniferepatterson.org/uploads/1/3/2/6/132696233/mufoj.pdf
    • http://lukegepun.nutritionrites.com/uploads/1/3/0/8/130814174/6251235.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9856/1959/files/rimixedatiguvowa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2345/6661/files/43866489022.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/besos_de_chocolate_mara_young.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3656/files/biolite_net_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/75854195650.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/guxirugotopapopos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1195/files/uniden_bc75xlt_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/5265/2951/files/1687695723.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/adobe_convert_to_word_online_login.pdf
    • https://cdn.shopify.com/s/files/1/0437/0045/3541/files/dasogakaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/fejogofoxawulexefibubisog.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/86225583071.pdf
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/ctet_question_paper_1_2020_download.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_off0000764a.bin
87b47528d80cd9befba0731fad976bef43f0eb027934bb4bf271146002303cf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x764A 5292 bytes
font_01_sfnt_off00008837.bin
10ee66e8e429a6183b6f00d857175b0648772b6871c3935ab6d2ffad54abbcf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8837 10536 bytes

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