Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ceff7b5f608a62…

MALICIOUS

PDF

41.8 KB Created: 2020-10-08 07:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e1b85a9d3a9a96fc885251c275c9c925 SHA-1: 608e7401c9a2bed8b9f986d044cc7d13c76b21ba SHA-256: 52ceff7b5f608a620167afebda600f48e64bb047529397cbc8fc238de82b4932
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, a common tactic for link farms and SEO manipulation. One prominent link, 'https://ttraff.ru/pify?keyword=pa+hunter+safety+course+cost', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to malicious infrastructure. The ML classifier strongly indicates 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://ttraff.ru/pify?keyword=pa+hunter+safety+course+cost 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/25ffcdc4-c19f-470b-a344-2ab3a893c8f4/wutor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cc4bda4-4b8a-414a-af5d-ee58247394d4/tadovebitikopez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63084546-eeb1-4b2e-8c47-416d85b2ab74/mimexovuzaromumixedovul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c43b3824-6d1d-474e-aff3-5b7661d812b6/wevepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a132b32-21a8-479f-b6e3-48c910b78aa0/ruxorajoxuxutodixupiwemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0676/6488/files/spirit_tree_seed_aground.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7629/1222/files/bidawebukunawogokujaxoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/7562/5894/files/xulebefenawupepasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/42993968062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8856/3361/files/jubadalajoziwisadopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81a681ce-5b1c-409a-9cb0-66fba5ea68b1/dozumubidokera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/477d9d06-a015-43d0-bbb6-8a2f097f46f6/52024019495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d57a88a7-1fee-46d7-be79-441976dd9742/potiwati.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_off00006580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6580 5040 bytes
SHA-256: d4590d0f1eeb4a1f6376f7086f3a3ac375972346e0bb6e9d9d0b3f2584ad7134
font_01_sfnt_off000076ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76AB 10440 bytes
SHA-256: 9d0e564b9b1972e8df3c81d3fcac517d6432522f0d339f9ead84ed004a079704

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