Malicious PDF — malware analysis report

Static analysis result for SHA-256 52c29e8cf6ff1927…

MALICIOUS

PDF

38.5 KB Created: 2020-11-01 10:17:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 25390318bdec55cdd6baabbe1da08606 SHA-1: de924b05db1690f584434d7d62c11c0104543be3 SHA-256: 52c29e8cf6ff192747f68f1b3b451189260397717e87497e6392f4548e8c165f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, with several pointing to known malicious redirectors or link farms. The document body itself is heavily obfuscated but contains URLs that are likely part of a link-building scheme or to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

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=frost+easton+books+by+brian+freeman In PDF document text
    • https://farukipem.weebly.com/uploads/1/3/4/4/134473356/libuduso_pegeparilezi_muzoluraj_powutek.pdfIn PDF document text
    • https://furasawi.weebly.com/uploads/1/3/4/3/134308809/603e1e095f00a25.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/1/0496/6753/9107/files/88639953626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8b73df7-d26b-440e-ad8d-6f9637967433/tabla_periodica_en_espaol_blanco_y.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0629/4178/files/cch_copy_1_trang.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c875acc-f397-45b9-b5b7-c0a033200d70/98245514331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/8566/0828/files/doxejirefem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6091/9965/files/qt_creator_tutorial_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1612a76-c9d1-48d9-a7ff-26dbdb36ad4e/abraham_kuyper_mine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7428/1382/files/98388844124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0672/3749/files/exclamatory_sentence_worksheet_grade_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03296bd4-4579-441d-b6cc-637b1ce86354/jalejedinenifoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2473/5643/files/baval.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8012/5089/files/xajolebeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0406/8516/files/31117077062.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57D8 5144 bytes
SHA-256: 3c5b1630d80d219d5e281e620c6d8c9492a4e77d0ebd83ce6f932cefa300db60
font_01_sfnt_off00006954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6954 10660 bytes
SHA-256: 9a834d880ff169ac6953bf70d1348ee0e5e091acbebc1d7070092da9f49266a3

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