Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e4ee30baf04e00…

MALICIOUS

PDF

59.1 KB Created: 2020-09-02 21:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0260179cd80497c3da2ace3fc053bd4a SHA-1: 733213c87f6621f4f2f5891251a8864872a13b45 SHA-256: 16e4ee30baf04e00877e2cffd7e11b4c33dc0aca3d616489444f7a081b3270cc
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.club, which is likely intended to lead the user to a malicious payload or phishing page. The document body, though heavily obfuscated, contains text related to AutoCAD drawings and includes the malicious URL, suggesting a lure to download or view a document. The presence of numerous external PDF links further supports a link farm or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=autocad+civil+drawing+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/5a4aad_51653b8caf87406989335effaae4eb16.pdf
    • https://static.usrfiles.com/ugd/5a1791_0bd6caa810c044ab93f3efa54e846cb5.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa89c02855b941628bacb9b8834f225e.pdf
    • https://static.usrfiles.com/ugd/9374a7_25565579ed86497c8ac6abcb96a7258e.pdf
    • https://static.usrfiles.com/ugd/440e29_7e54dc0f0fbc46b280e6860ee34125c9.pdf
    • https://static.usrfiles.com/ugd/8b2c09_164b2083a698435fbebc4ebf7270f509.pdf
    • https://static.usrfiles.com/ugd/253000_569d804a8f3d4218ad28cc49bff3a05b.pdf
    • https://static.usrfiles.com/ugd/bb4607_273dd6f06ee14eb8a393c9caa908f349.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_ea99488b10ae409ea006f83aaf6ac82f.pdf
    • https://static.usrfiles.com/ugd/4dd980_2aba53464bd34582b823618e6ae488f4.pdf
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/9962287613.pdf
    • https://cdn.shopify.com/s/files/1/0461/6686/8120/files/wuzulidumarasin.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/92143805556.pdf
    • https://cdn.shopify.com/s/files/1/0429/5449/0012/files/63240477374.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7576/files/sofipabimaxogeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/7470/5815/files/barrier_methods_of_family_planning.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/17497093796.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riwemabosemuridaredexe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/lepitejezixewiwusuwar.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/23679235488.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d8b.bin
4da906cdd7608a0c8e0404a79fd7a7df4eda5d74a82c4df40094fb2974295d33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8B 5052 bytes
font_01_sfnt_off00007ec9.bin
d60a3a291e38ded1d026a5ec1b564211a736e9d3ba7cce90038cbb40aee24190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC9 3064 bytes
font_02_sfnt_off00008bd6.bin
007b7a5a5808b6b6fb5173cb9786d20477e2038dee65d78c83a7af0a95aedf97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD6 15288 bytes
font_03_sfnt_off0000bb36.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB36 16092 bytes
font_04_sfnt_off0000cffd.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFD 4324 bytes

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