Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a4bbe3ec70fb6b…

MALICIOUS

PDF

32.6 KB Created: 2020-08-02 13:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0047113a4ae39fb59f2c0ad9912d5fc5 SHA-1: 1251fe0e74d916d30c1f31777f3e61b38f97d2d2 SHA-256: e0a4bbe3ec70fb6b114a513f9834bb89beb48c2138409ab094ce388c99b43cbf
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text suggesting it is a lure for a 'wackerly mathematical statistics solutions manual pdf'. This indicates a social engineering attack aiming to trick users into clicking the malicious link.

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/pify?keyword=wackerly+mathematical+statistics+solutions+manual+pdf
    • http://files.livingwaterministriesofperry.org/uploads/1/3/1/0/131070827/7799418.pdf
    • http://files.genesisoutdoorservices.com/uploads/1/3/1/4/131437615/3467b6c691.pdf
    • http://files.coobcoffee.com/uploads/1/3/1/4/131437750/da084fa3cf7e.pdf
    • http://files.constructionqualitycouncil.org/uploads/1/3/1/8/131856492/xabaxukavorol.pdf
    • http://files.msamsonovcpa.com/uploads/1/3/0/7/130740011/534521.pdf
    • https://cdn.shopify.com/s/files/1/0428/5300/7516/files/babuni.pdf
    • https://cdn.shopify.com/s/files/1/0434/4555/1256/files/instafollow_pro_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/army_class_b_uniform_setup.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/fisikujegemafivonodelasez.pdf
    • https://cdn.shopify.com/s/files/1/0431/0401/0389/files/74950134470.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/84436610348.pdf
    • https://cdn.shopify.com/s/files/1/0437/7876/9045/files/25286403838.pdf
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/26224260576.pdf
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/38872129028.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/lutitutebonoxel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/34577552026.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_off0000428e.bin
e29ccec4c1c36dad8997bc903088601a67ee6775ac1cd2a941c0c215a9d57366		 pdf-font-stream PDF embedded font (sfnt) at offset 0x428E 5576 bytes
font_01_sfnt_off00005573.bin
da3d0085e6027fd9ff24bcd664db2a346925e5bae28629666730c883c9dcfa97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5573 9280 bytes

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