Malicious PDF — malware analysis report

Static analysis result for SHA-256 d927c51b9569c5c4…

MALICIOUS

PDF

36.5 KB Created: 2020-09-21 01:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9730f7015149088a1aeb05b536c148a SHA-1: fa455e21a455d652f80ed6961e7ab3741c32e96a SHA-256: d927c51b9569c5c4c54c1caf545fa575d76ff49b25f97b0751f0f660dbf72f8e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.club, which is likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains references to game-related keywords and the malicious URL, suggesting a lure to entice users to click the link. The presence of a PDF link farm heuristic further indicates a campaign to distribute malicious links.

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.club/wix?keyword=bleach+vs+naruto+3.2+unblocked+games+66
    • http://files.bigpineschools.org/uploads/1/3/1/3/131378897/858e07af06c.pdf
    • http://files.marinyacottagekitchen.com/uploads/1/3/0/7/130776757/0b3819e07c37e7.pdf
    • http://ruwesajan.clydeaspevig.com/uploads/1/3/2/7/132710795/wijizas.pdf
    • https://0b55cd3c-24de-4761-a22b-21859688b097.filesusr.com/ugd/b0c717_1375ac1ce0fa424794dfad81e1bd2849.pdf?index=true
    • https://6c777d4b-d6ea-466d-a2a0-64fbdc51d0e0.filesusr.com/ugd/9058e5_cc1ca95ca106441db19bbe1e73f1e895.pdf?index=true
    • https://11f944df-912f-4799-95cc-5788021f89f6.filesusr.com/ugd/83e584_c7f3c6bc1fd6417b953050270c13c171.pdf?index=true
    • https://b8c2d6cb-c51e-471e-b9ce-cae1c5486dc4.filesusr.com/ugd/c068f8_e925502e4e1348fda1a6afdae14b7e8c.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/6131/2676/files/timex_nature_sounds_alarm_clock_t276b_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2426/8968/files/guia_ada_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/id_card_maker_program_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/7486/9665/files/83671972461.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/calligraphy_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/4283/9455/files/larson_calculus_5th_edition.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000483a.bin
401e1d632151ff9e5cbc8c3a1ec9e5016dc9ec172cd9ead8d8b2e73ce16f64d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x483A 6148 bytes
font_01_sfnt_off00005d00.bin
55c8eb89a44da4154db7b68d7e4d66dabb3abb1f0ac51f1537661e902b53c6d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D00 12572 bytes

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