Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c01054bbcfa398…

MALICIOUS

PDF

48.5 KB Created: 2020-08-30 18:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2481e153dac9518713f22f7eb177e4ac SHA-1: 142da032e24f63f80ec36388b2f7b9126b5e14c1 SHA-256: 67c01054bbcfa3988f11c5f31836d3a80b95f23403eb44d872b8ef53e6a1ee99
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. It also exhibits a PDF link farm, suggesting an attempt to distribute or mask malicious links. The presence of a 'download button' lure further supports a malicious intent to trick users into clicking on these links, likely to download malware. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.com/wix?keyword=adobe+distiller+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3e87bf_630b9989384c4492baec9b433fa59743.pdf
    • https://static.usrfiles.com/ugd/b58d21_b9f7123ca94e420e8c4fe5b8ac70eac2.pdf
    • https://static.usrfiles.com/ugd/f14cf6_9b4906ccf9af40cb9eaffe9e2141fb98.pdf
    • https://static.usrfiles.com/ugd/0f1814_b75c7e2ade72420fa42f8c9854295196.pdf
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/sogurawameromuzorurujobuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6261/files/devotibagufijatovivo.pdf
    • https://cdn.shopify.com/s/files/1/0445/8535/3380/files/belt_and_road_initiative_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/goruwenapatatuxa.pdf
    • https://cdn.shopify.com/s/files/1/0440/4881/0149/files/mowon.pdf
    • https://cdn.shopify.com/s/files/1/0429/0805/7759/files/sat_math_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/4237/1741/files/nomibiposivosimug.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/haryana_laboratory_attendant_answer_key_2018.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_e37a27550c8d4c979e2757b55d6e3f9d.pdf
    • https://static.usrfiles.com/ugd/c20ea7_d6c2143162d14b6fb09aee23d1b6c735.pdf
    • https://static.usrfiles.com/ugd/b8c837_29722c605d6244a189447036c365eea1.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2bf66bbaf7a4b95838343b21e832e35.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_off00007f3b.bin
7aefa63e2fa460f49d989951cbaff834b22bf9da5fdf7a4102ad23d17a7f0ca6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3B 5040 bytes
font_01_sfnt_off00009072.bin
1e00b5a596ed6ad964fb1fc8d376de11eaa4a5037b81dbd48d32f2be459db573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9072 10748 bytes

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