Malicious PDF — malware analysis report

Static analysis result for SHA-256 22037367b8f44dc4…

MALICIOUS

PDF

51.6 KB Created: 2020-08-17 05:38:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bf26e4cfbd51c107b98db18bc575e36 SHA-1: 506367f06fe19a222cc403d238c9c1d289418835 SHA-256: 22037367b8f44dc41bd09ccf9b88db295ea5f9ee040a18ae4b8f95b4e830c9d1
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a 'first aid merit badge worksheet'. This suggests a phishing or malware distribution attempt. The PDF also exhibits characteristics of a link farm, with numerous embedded links pointing to various domains, many of which are unknown or potentially malicious. No scripts were extracted, but the presence of malicious links and the ML classification strongly indicate malicious intent.

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=first+aid+merit+badge+worksheet+2019
    • http://bixas.mmarshallchurch.com/uploads/1/3/1/8/131871729/a49e07.pdf
    • http://mukakavi.jelliegoedhart.com/uploads/1/3/0/7/130775354/losidize.pdf
    • http://files.hometowncoffeeandtea.com/uploads/1/3/1/8/131857114/lepokudej.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/dibegexaxabuwojukan.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/fusuril.pdf
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/72847195409.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0476/files/87338726776.pdf
    • https://cdn.shopify.com/s/files/1/0430/6167/4133/files/17563758442.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zixetirubopejama.pdf
    • https://cdn.shopify.com/s/files/1/0435/7118/3777/files/fimugerekufipusa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/fuzavosojesotowuralodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/bamboleo_chords.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/6teen_theme_song.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e23.bin
9efbd10e88ca4a240a101b1f79799cf90599ac44cc981e530673c250e9fdf94f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E23 5620 bytes
font_01_sfnt_off0000914e.bin
b154c107a54233eb6611bbadc3e6fdf1dac7cb020cc8ed1c91c1db91e3594709		 pdf-font-stream PDF embedded font (sfnt) at offset 0x914E 9948 bytes
font_02_sfnt_off0000b342.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB342 4324 bytes

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