Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9635636033b575…

MALICIOUS

PDF

38.6 KB Created: 2020-10-03 00:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7133e47e60035ac20c88c9f45bd7d38c SHA-1: de093b9aadaba3db224efc827a566fecb7918dbc SHA-256: 0d9635636033b575fe79cd3534695b0d6e1a2c0553411bedcef77b47a4240117
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/pify?keyword=goldlink+diaspora+zip+album+download'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0484/9303/5670/files/clairemont_high_school_powerschool.pdf'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to download content.

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://gettraff.ru/pify?keyword=goldlink+diaspora+zip+album+download In PDF document text
    • http://goban.shelbyssweets.org/uploads/1/3/0/7/130775085/7110627.pdfIn PDF document text
    • http://files.robynmichon.com/uploads/1/3/0/8/130873855/3202810.pdfIn PDF document text
    • http://files.phisterequipment.com/uploads/1/3/1/8/131871477/19448ad.pdfIn PDF document text
    • http://files.caumorgans.com/uploads/1/3/1/3/131379045/1425326.pdfIn PDF document text
    • http://zefuw.gregorylavender.com/uploads/1/3/2/7/132740494/tagog-gojomul-gomoxamikipeje-wigonepiwul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9303/5670/files/clairemont_high_school_powerschool.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8767/6063/files/regekalowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8254/6341/files/what_does_irs_form_cp_575_look_like.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c1e4ac1-ba14-4b03-afea-3afcc55c8ce2/59761498144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d541cedb-ce20-4318-83f4-d4cf75ad0731/zeweredexolusaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/zutetugafebiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9565/2504/files/wunixudonidipat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0899/9074/files/ri_judiciary_public_access_portal.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000584f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x584F 5480 bytes
SHA-256: 0c64efe4cad57ed31c0133eb8fe7b0c4e0d775815997422a67a8516eb83e900e
font_01_sfnt_off00006af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF9 10196 bytes
SHA-256: 338b677284eaa8c4896fec1021c1188de500523cd176d7af9c90ee321619af5c

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