Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e716f3d940831e5…

MALICIOUS

PDF

46.0 KB Created: 2020-09-01 00:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c6ce5f1266d540a0f83106224d6d1fc SHA-1: e002ede92bcb9d88ff425ecd40eaf225c43b40ca SHA-256: 6e716f3d940831e568bbbcccb841f1ea0ee36214f440ac22319908478c5ec5f0
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector URL. The document body, though heavily obfuscated, contains the primary malicious URL. This suggests the PDF is designed to act as a link farm, potentially leading users to malicious content or phishing sites. No scripts were extracted, but the presence of numerous external links indicates a redirection-based attack.

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.ru/wix?keyword=design+technology+specification+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/83f04e_bc7ac18e840c40968c0fdd0df1d50b5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa232c00dec347458a860aaa1b17f07f.pdf
    • https://static.usrfiles.com/ugd/87fdc7_90fda7e986524db89dc613e99ce89f9e.pdf
    • https://static.usrfiles.com/ugd/85d67f_0695b16da0e0481aae22db52b34f1492.pdf
    • https://static.usrfiles.com/ugd/d4da64_225aa3c185b6459bb40cce20b8b6a420.pdf
    • https://static.usrfiles.com/ugd/edb4a7_79ed8c7b18354b5995d8d5b5b1f9be81.pdf
    • https://static.usrfiles.com/ugd/b8c837_96fc0f23e4144a17826ac6aca3cbee9b.pdf
    • https://static.usrfiles.com/ugd/10e3af_d4736d787a6c4d1dab911e75dbe090f0.pdf
    • https://static.usrfiles.com/ugd/b91566_50f76987ba4a400a9a7bd1db7dccc104.pdf
    • https://static.usrfiles.com/ugd/b88e3d_dc81b39e49454f2f832241bb31a62569.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9892/files/six_ideas_that_shaped_physics_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/longman_children_s_picture_dictionary_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6351/files/31343169666.pdf
    • https://cdn.shopify.com/s/files/1/0438/3673/5650/files/canvas_modelo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/converting_to_editable_word_document_with_adobe.pdf
    • https://static.usrfiles.com/ugd/b916f4_4012cc47028740aca13f6fdba5b6427d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7547b62a960b4f7ba97de62b12829a1d.pdf
    • https://static.usrfiles.com/ugd/20d83a_1553a2fc99a6454fbdac186c85876439.pdf
    • https://static.usrfiles.com/ugd/f459ea_4635f7089ef2439ea729e470a81abb10.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdfa90182a5d4bc28e25f13ed5d7ec77.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006691.bin
51bba6f43b0060dea1c140e9a96af5384692e12c69f238248b58b9975938e2e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6691 5436 bytes
font_01_sfnt_off00007906.bin
a5b941b315e8590216d580c1d703d23c7a98de009ce440e04a80a5c7b3321708		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7906 16200 bytes

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