Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dedcaa4e42153bb…

MALICIOUS

PDF

88.1 KB Created: 2020-11-01 22:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 76c8d5995571fa9799fdf70e3936b1ed SHA-1: 192c3f52c113349a9c72519dbded3b099c72b1c8 SHA-256: 7dedcaa4e42153bb49b8ea15907c6031809d27530c0d02ff5258df1222fdb5d9
214 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a brand impersonation lure for credential phishing. The embedded URL 'https://ggtraff.ru/aws?keyword=key+root+master+mod+apk+fire+hd+7' is a primary indicator of a malicious redirector. The document body, though heavily obfuscated, contains references to this URL, suggesting it's the intended destination for the user. The presence of numerous PDF links also points to a link farm or distribution mechanism.

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/7194830.pdf.
  • 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://ggtraff.ru/aws?keyword=key+root+master+mod+apk+fire+hd+7 In PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/7194830.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/fubijadorobivaze.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/1/0484/9929/4363/files/90876310075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6767/0689/files/10048403631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5296/4266/files/rapurulexufevigeto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e02b399-e57c-4fca-8643-b1401b37ec4e/57459504367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1593/7441/files/organic_chemistry_reactions_worksheet_high_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4903/3114/files/download_full_screen_caller_id_pro_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8d9f12b-1634-4078-900b-81732635d957/guzotovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2147/5738/files/danny_phantom_crossover_fanfiction_frozen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3669/1610/files/love_weaves_through_a_millennium_trailer.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10088 5464 bytes
SHA-256: 541b75a40606fddeaeb18d6e61b0b8c14448dd392624d30651b2004c8d8843ac
font_01_sfnt_off00011302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11302 13072 bytes
SHA-256: ee86f27d2edf2c47c1c68df3072f9e68798149cc56386151ba00ee7ec94590c1
font_02_sfnt_off00013d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D6F 16376 bytes
SHA-256: 684a3c196e802b4dc45ee85e0d12f41c83d6b6c6a55a83cec5fb8e332ee9aa36

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