Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b01a2cf910fdcf…

MALICIOUS

PDF

43.6 KB Created: 2020-10-26 22:12:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d6d36d00c00884265ba0e9c63292387 SHA-1: b99e28f50abcd8c8855c24b97d30d16207d4bf3d SHA-256: a6b01a2cf910fdcf05441cc83329d2a7ba9cfd45f25c4a4c115334ac73f3077e
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with keywords suggesting a free download. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the embedded link is the primary indicator of malicious intent, likely leading to a further stage of infection.

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.ru/123?keyword=rome+sweet+home+pdf+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d7a0eed6-4e67-4f28-b160-f3ba5d7a4161/fofiwu.pdf
    • https://uploads.strikinglycdn.com/files/dce194eb-199d-44df-b6c1-05bc0402e6ed/swtor_mods_guide.pdf
    • https://uploads.strikinglycdn.com/files/39bb553d-7150-4334-978a-e643d14a1ceb/27876811214.pdf
    • https://uploads.strikinglycdn.com/files/0b28af6d-8321-43c4-a88f-fd471b703731/mavelaviberipufilos.pdf
    • https://uploads.strikinglycdn.com/files/65ed858e-f80c-4f4f-8ba9-1a6d093bb045/25718073120.pdf
    • https://s3.amazonaws.com/bizamesuwepe/xaner.pdf
    • https://s3.amazonaws.com/memul/1023505768.pdf
    • https://s3.amazonaws.com/peveziwoguxuzam/62253354501.pdf
    • https://s3.amazonaws.com/pazifetanegapu/treatment_of_rheumatic_fever.pdf
    • https://s3.amazonaws.com/luramamelolem/batman_the_killing_joke_portugues.pdf
    • https://s3.amazonaws.com/henghuili-files/arunachal_pradesh_road_map.pdf
    • https://s3.amazonaws.com/zuxadol/83649757795.pdf
    • https://s3.amazonaws.com/nowonovege/53775068939.pdf
    • https://uploads.strikinglycdn.com/files/d7bd2c03-c50b-4326-9474-1289995c7363/9322191778.pdf
    • https://uploads.strikinglycdn.com/files/2ae213a6-54fc-4633-90de-0df6be00f39b/14511132342.pdf
    • https://uploads.strikinglycdn.com/files/8ade0654-a25b-4c91-b507-bb284678ffda/sadozoxesik.pdf
    • https://uploads.strikinglycdn.com/files/9e4a7dfb-3d13-4eff-91fc-74b659e79cbd/68439902979.pdf
    • https://uploads.strikinglycdn.com/files/ce59bdc6-7055-42e3-867b-20ad3a2493d7/my_time_at_portia_broom.pdf
    • https://uploads.strikinglycdn.com/files/f7ada190-f714-4e81-ad44-dac0b1172ea5/vinasitemelopunuwofira.pdf
    • https://uploads.strikinglycdn.com/files/3299a8d2-3d2f-4845-ae58-be9c1366e7d3/dvd_logiciel_en_des_flammes_dcharge.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006815.bin
382591f0d78391fa71a0ea6e569b7b0c8d96ac233e9922060746e54be64307cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6815 5380 bytes
font_01_sfnt_off00007a56.bin
89d46777a3bbd6a76863bba67678c800e5b4e22cc127e60ac7036859fe4866a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A56 11548 bytes

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