Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca7e3ab9731680e…

MALICIOUS

PDF

43.0 KB Created: 2020-09-05 02:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0911cfa9fcbc9fba5a3f735b452db477 SHA-1: 78e5ba5662f7bc0daad8528729c475d54d3821ec SHA-256: 6ca7e3ab9731680ef3ece7ecda2b93275fc84e55fdd90cb39a5d58d1dd0515cf
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one identified as a malicious redirector. The presence of a 'download button' lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content. The document body, though heavily obfuscated, contains the malicious URL, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=talismania+deluxe+apk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/4135/7977/files/texas_rental_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9957/files/e2_80_9ccontempt_e2_80_9d.pdf
    • https://cdn.shopify.com/s/files/1/0465/0139/6638/files/city_of_roseville_parks_and_recreation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0444/7030/4935/files/adivasi_song_2018_video.pdf
    • https://cdn.shopify.com/s/files/1/0432/9861/9557/files/61565449321.pdf
    • https://static.usrfiles.com/ugd/e42ee3_1f9eab8aba864e70938af40487a33422.pdf
    • https://static.usrfiles.com/ugd/c57cae_faf1a53b5ebd4bd5bebc1755a87c4bf0.pdf
    • https://static.usrfiles.com/ugd/fb5067_dce5e4f66d944fabaa18c100646e15f2.pdf
    • https://static.usrfiles.com/ugd/735189_264a5a96340d444b8ee908ace58aa696.pdf
    • https://static.usrfiles.com/ugd/432b07_273a869cc10d4674bd3d11158ab2e71f.pdf
    • https://static.usrfiles.com/ugd/b926a8_2c83c4ea9e6a4e8f8fbfe39edf762d23.pdf
    • https://static.usrfiles.com/ugd/227d0f_93dfc21e15854d85853a177f2e080f59.pdf
    • https://static.usrfiles.com/ugd/9cc572_7d4550204a1c4dd9a92e708120a1e792.pdf
    • https://static.usrfiles.com/ugd/b8c837_affdca35539d4e3f84b75cf182a391b1.pdf
    • https://static.usrfiles.com/ugd/82e28d_a18aab19d68c450eaf947af250fbbceb.pdf
    • https://static.usrfiles.com/ugd/64db51_f8190867ede141a5904057eccd0dcc42.pdf
    • https://static.usrfiles.com/ugd/b8c837_d05f0c953a8b45b883990788c19958dd.pdf
    • https://static.usrfiles.com/ugd/a32c20_8c39e84c12704f55903946a378e1ed76.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d24.bin
fa4ca0ae1ee1cb53a40d34e23160b8f1361dad6b6ce7cd95245190dd60c7877c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D24 4780 bytes
font_01_sfnt_off00006d3d.bin
51b790fad15a46d25d3af35eccb48e49180695bbba791ae67b60397e04f6f324		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3D 10592 bytes
font_02_sfnt_off00009151.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9151 4324 bytes

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