Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bde6570d69afe9b…

MALICIOUS

PDF

52.6 KB Created: 2020-11-06 13:09:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7ff07384b9dc6fce3770e29a4cc97c34 SHA-1: 15cc0210dccabf222eddcbedcdb7f66d31bd328f SHA-256: 9bde6570d69afe9bb3e8f53fcf1f9d7f1897b3a5bca806b20833b3b4d06bcd87
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'traffine.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on platforms like Strikingly and S3, indicates a link farm or SEO poisoning attempt to distribute the malicious 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://traffine.ru/aws?keyword=keto+burn+1250+dosage In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5f93ebf74a84b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_5f8ab15874e9e.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/ce43470f1.pdfIn PDF document text
    • https://nubenitenaw.weebly.com/uploads/1/3/4/0/134016689/baramobevikonik-sopuramixifiwop-vituduvurozik-rupusatomomev.pdfIn PDF document text
    • https://subonotewus.weebly.com/uploads/1/3/4/3/134347286/4423174.pdfIn PDF document text
    • https://poxozebirineba.weebly.com/uploads/1/3/4/4/134447173/kupomunorimalu.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/ritiniju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9c61a26f-2f8e-4b5f-9448-51e340150a58/patoletirilozizixe.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/mazda_cx3_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b31adb05-117e-46c2-ba2a-38e395853b35/30365980600.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/45138725099.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/canasta_basica_ecuador_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7521121b-6586-4661-9825-47f2396b0389/57979259235.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/4382882370.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/sufunafu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8008 5356 bytes
SHA-256: cdc91973588605e16596b8af751d0370a45dc92d7e942909b77b71c1bdae1e47
font_01_sfnt_off0000924a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x924A 10796 bytes
SHA-256: dcb4f89bdfb837cfcb5bb927af8a0ecaed37faaee7b53dbb8835f530425e0488
font_02_sfnt_off0000b70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB70D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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