Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0e50ce89f04c15…

MALICIOUS

PDF

41.5 KB Created: 2020-08-31 03:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5da3a9f0b5bce93d0a086c1bcb56a5b SHA-1: 4ab4925657512ea69ffe9f663966bfbee32ddd1f SHA-256: be0e50ce89f04c15a1944c29644f15cb81a48d435e745a7968542895e275044b
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.ru, which is likely used to host further malicious content or phishing pages. The document body and embedded links suggest an attempt to disguise the malicious intent with a seemingly legitimate document title. No scripts were extracted, limiting the analysis of the exact payload delivery mechanism.

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.ru/wix?keyword=the+kite+runner+chapter+5
    • https://static.usrfiles.com/ugd/b8c837_f249672c32484e34884e2139623e235b.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ef64ecb730745fa80d6796dcadb740c.pdf
    • https://static.usrfiles.com/ugd/b58d21_1850b635747f467db0d1e965a0dc7b9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcfe8c08dd064eeebf2eb347c2c10f29.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e07387318ce4705b798c2e772f050b9.pdf
    • https://cdn.shopify.com/s/files/1/0430/5800/4117/files/nazik_dhol_videos_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3030/6203/files/56060026580.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/zalenulakelizisa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7188/0870/files/worksafe_wa_risk_assessment_form.pdf
    • https://cdn.shopify.com/s/files/1/0437/1405/2247/files/94625784838.pdf
    • https://cdn.shopify.com/s/files/1/0428/8721/7319/files/31063227173.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9713/files/42005679272.pdf
    • https://cdn.shopify.com/s/files/1/0428/7270/1095/files/3573290075.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3022/files/pubigumerek.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_off00006893.bin
a1c36367df7c8b8e1ec82784a531f9efa5faf8b8cc763b1868b0000cd0f1178f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6893 4948 bytes
font_01_sfnt_off0000795c.bin
f22e25742c46665bd0c314148fc1eb59a7a15ed7e93eedce477c408ded9a0212		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795C 9440 bytes

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