Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f29a26a63515b66…

MALICIOUS

PDF

41.2 KB Created: 2020-09-18 15:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0094ce78ada9b3de055f911878dbb0d7 SHA-1: 866d591addc4cd5d48da6cc19207bd1edc591f04 SHA-256: 7f29a26a63515b66fd198a29dde02eb8a67cc4dfd0384fdf0e8043a70ecd494a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large external PDF link farm. The primary malicious URL identified is ttraff.com, which is linked to a keyword search. The document body contains garbled text but also includes the malicious URL and several benign-looking Shopify URLs, suggesting a deceptive lure. The ML classifier also strongly indicated maliciousness.

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.
  • 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.
  • 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/wix?keyword=cake+walk+game+printable
    • http://kolivat.belab-eurachem2016.com/uploads/1/3/0/8/130813668/6347893.pdf
    • http://files.turntothework.net/uploads/1/3/1/3/131381288/busezetazor_subib_fusofekob_tefafakulolekap.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/cisco_networking_essentials.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/autodesk_revit_basics.pdf
    • https://cdn.shopify.com/s/files/1/0439/2773/2379/files/ignou_mcom_assignment_2020_19_solved_guffo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7029/1096/files/volkswagen_jetta_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/21383957924.pdf
    • https://cdn.shopify.com/s/files/1/0435/3966/0954/files/catalogue_schneider_2020_en_francais.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/66393194156.pdf
    • https://cdn.shopify.com/s/files/1/0460/1158/0577/files/osrs_surprise_exam_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/0905/4619/files/retozilarelu.pdf
    • https://9e24f20d-c7fb-4bc8-ba0c-593529ace43f.filesusr.com/ugd/b81754_b5eeb91100fe4ab9a793198fbeb8cdbf.pdf?index=true
    • https://1d2f6abd-f036-457f-a920-ae901a46d81d.filesusr.com/ugd/8ba634_ce8d22c56d20412184bba7b4d141fc16.pdf?index=true
    • https://443a664d-5d62-4700-afb8-cb65f7b79794.filesusr.com/ugd/a32c20_829bbbd0ffbb45a3ad3fe9b710b5a5d0.pdf?index=true
    • https://ab34fc3c-9526-47d4-ad82-62e9d79fa09c.filesusr.com/ugd/d4579c_00f20aba586d4feea83dc338df7d2ec5.pdf?index=true
    • https://8c6da19c-edb2-4673-bd95-be0edcb7e044.filesusr.com/ugd/5a4aad_cbe8057b6df745e4acedb8d2261dc011.pdf?index=true
    • 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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000635a.bin
dcb90481e411d9987b7d732fb9c6b1ef5765295b582a5faea00ff4c5ebec7ab8
pdf-font-stream PDF embedded font (sfnt) at offset 0x635A 5164 bytes
font_01_sfnt_off000074e4.bin
e93a33c6504d1dca35b8f4a2b6e7f259da7c270639966c544461b32a64571fb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E4 10340 bytes