Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a4dab1873979b53…

MALICIOUS

PDF

45.2 KB Created: 2020-10-06 20:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 40a558f39aafa1cff784fe5a78239090 SHA-1: e720dcc74e43e5097144e8420a07d391aade9698 SHA-256: 1a4dab1873979b53eae777d9c32a0f10d76555042217253ef5e085426906c80e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The primary malicious URL identified is 'https://ttraff.club/pify?keyword=miss+america+nurse+speech'. While the document body is heavily obfuscated, the presence of this link and the heuristic firings strongly suggest a phishing or redirection attack designed to lead users to 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 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.club/pify?keyword=miss+america+nurse+speech In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/56d81558-23e5-4554-a15c-d71b104b24dd/78748082800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec1a7005-168d-48c6-b4bc-d1996b6b101b/samojoxododesefabawan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7ad7019-04de-4b9b-bd81-a2aa8eb99c5e/31898341197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/567f6d24-c981-4506-85d6-bae05568d101/zepopokujevuxolizoluvom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02a5426e-6188-45cf-bc99-ca1ac8e56726/vonopuzavewuzekitavegid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd40518d-4e37-4378-a532-5b28895fb8b2/8338339469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6232c31-9162-47a1-b4db-73e5110ce7f9/bixivitogusafagomiduki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e865f28-881a-401b-a786-d25f486b3ad5/12824514552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1123/6259/files/kunube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3187/0105/files/22084673577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5740/0994/files/weguviweledulezurokifif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/7979/5357/files/edmontonia_coloring_page.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_off00006871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6871 5144 bytes
SHA-256: 5e2f38caac62e1d650ba2e1edc0ba8779fa490750b09a65cfc33d9b4a9d8e59a
font_01_sfnt_off000079d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D0 15056 bytes
SHA-256: 30f8da85112c2e3e9d7647c2bd86d400694772dd1fad55310dd9a55f8f785f92

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