Malicious PDF — malware analysis report

Static analysis result for SHA-256 501c87b29f4e3234…

MALICIOUS

PDF

51.9 KB Created: 2020-11-03 03:05:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 385c48dbd3b07be43804b223ea0d29c7 SHA-1: 0fa1296f4416a993c73fb86b16aa937cb10df8bf SHA-256: 501c87b29f4e32346d1079070854a71998a1adfa44fc90f2b0b4a8cfc1200ae5
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/123?keyword=life+time+fitness+lakeville+classes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372980/normal_5f91293a860ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374956/normal_5f9d0ae752dc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f875db512bb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_5f9c222359e9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f8954fb1732f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384835/normal_5f95055f88674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381318/normal_5f9c5a37705bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407989/normal_5f9cbd2bd7a25.pdfIn 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/53693587-00bd-4aa7-9303-72b92425cb81/37916998846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/529d4a7b-ac28-441a-a627-3b44022650d1/bukapogetumupirejezunalum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375a9e55-7734-4ced-b9fc-68661071f256/kuvodij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bf957d6-a85a-486b-b467-863c1e3ab2de/tositonije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc78d00b-3edc-4007-916b-b286c2073ca3/81035147952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b686bb-2a9c-476b-b59b-11735071bc8c/63533976723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86c3a716-1798-4fcf-8766-fc736fb01edf/34438134066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaca70e6-b5a8-4c51-8d41-959272e40837/77107248319.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_off000076ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76FF 4996 bytes
SHA-256: a9f0d46e13d4b33923e656e8a4c9d10968c73951fe8ff8d65512ef4772180425
font_01_sfnt_off000087ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87FF 10764 bytes
SHA-256: b48240cb576f38d265610956122201ed3954bafcb95efedbd8e776f5a580fea3
font_02_sfnt_off0000acd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACD7 16176 bytes
SHA-256: b34bc647a855ee836f1f15d23d07ef8fc86c66da9663e0d441a972b7f835d709

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