Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1576f90e105c22…

MALICIOUS

PDF

57.1 KB Created: 2020-10-07 07:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 08ea6ff7fde0600529e2e3395243c063 SHA-1: db25d7144f8b3eb3fe3e2c7c52a99a705cc46705 SHA-256: fd1576f90e105c2209cb57fd8d0ec87d537b0c085a2e82f337bf08c9f1fbd63d
124 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/pify?keyword=the+preposition+song', suggesting a lure. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to lead users to external, potentially harmful 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.link/pify?keyword=the+preposition+song In PDF document text
    • https://site-1036807.mozfiles.com/files/1036807/59284578350.pdfIn PDF document text
    • https://site-1039907.mozfiles.com/files/1039907/4077948623.pdfIn PDF document text
    • https://site-1036635.mozfiles.com/files/1036635/ludigipixudox.pdfIn PDF document text
    • https://site-1043603.mozfiles.com/files/1043603/96097157077.pdfIn PDF document text
    • http://files.amcomx.com/uploads/1/3/0/7/130740207/8294e52de9fad0.pdfIn PDF document text
    • http://files.missionbeachcassowaries.com/uploads/1/3/0/8/130874691/sepapikezibuna.pdfIn PDF document text
    • https://site-1036879.mozfiles.com/files/1036879/34366609275.pdfIn PDF document text
    • https://site-1038925.mozfiles.com/files/1038925/72226925086.pdfIn PDF document text
    • https://site-1038631.mozfiles.com/files/1038631/newepijusizexikiwotixe.pdfIn PDF document text
    • https://site-1036724.mozfiles.com/files/1036724/woribalaraporiwumuveza.pdfIn PDF document text
    • https://site-1042620.mozfiles.com/files/1042620/2855581927.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/1/0436/2865/8848/files/american_pie_5_trailer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/xofupoguzesotisatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7794/0886/files/70134853785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8779/9492/files/dont_laugh_at_me_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6388/1115/files/53714552454.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_off0000a223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA223 4788 bytes
SHA-256: 88b2f7a87484863b41842ab7a4aa73ebf761178ab6cbabe97fc9cb18cf08b551
font_01_sfnt_off0000b26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB26A 10384 bytes
SHA-256: 83d50b135b3c9abeb96146be9301f49d6f6f563aa4e368754647874dfb84033a

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