Malicious PDF — malware analysis report

Static analysis result for SHA-256 7378d1c4974781b9…

MALICIOUS

PDF

65.1 KB Created: 2020-08-28 23:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0d8bbd173d39c6dba17efcc1c17a18f SHA-1: 8fdd12a60763e19de0ebbc9b0d734aad1fe02316 SHA-256: 7378d1c4974781b9daabcdf50b2577ce3f8cea857a436427d9527fe3415ebfa8
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=ap+stats+study+guide', suggesting a phishing or scam attempt disguised as educational material. The presence of numerous other links, many pointing to benign-looking PDF files, indicates a link farm strategy, likely to obscure the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.link/wix?keyword=ap+stats+study+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_5499244c1e324821b1d722226c25bdcf.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5fec7998f894ceabaf8546830461235.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a102dd05cd640c09c166b36a8101432.pdf
    • https://cdn.shopify.com/s/files/1/0438/1815/6192/files/waste_to_energy_projects.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/printable_letter_worksheets_for_4_year_olds.pdf
    • https://cdn.shopify.com/s/files/1/0429/5727/5299/files/61231300577.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/enzimlerle_ilgili_sorular.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/2733148701.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/femepotufitaxaturu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9756/3037/files/vebarajox.pdf
    • https://static.usrfiles.com/ugd/b8c837_676b10df6a5a49e8b9d0f0192a7b4ade.pdf
    • https://static.usrfiles.com/ugd/b8c837_8074e4e6fb15479d8a3e200b9c09d4bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbbe5d7c3b594555a9671ce984d57710.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e4e2a1d621446939847d2da4ef603dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_b333c4d086224df4b36d7181bd313ca5.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_off00006e6b.bin
360caff3ea2e1e08f907299acfd13a1589e8d5a83163ed0dded1dee917ca2656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6B 4756 bytes
font_01_sfnt_off00007ea0.bin
67cf15c140054d3a94bab101e70918c12202b324d4ac3ceaa96b94e9e2168546		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA0 15016 bytes
font_02_sfnt_off0000a6e1.bin
c5002293e304c277bad0b216e6debc4ca88378da2fa1c963466b03f268cb5c03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6E1 10352 bytes
font_03_sfnt_off0000ca75.bin
112c9db3f6535fd499bf411087b1fd71bd9cd12e5f81df40c2ab0344b7552fb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA75 18404 bytes
font_04_sfnt_off0000e727.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE727 4324 bytes

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