Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e14a179ecff04c…

MALICIOUS

PDF

45.9 KB Created: 2020-09-10 20:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b91396fcb41810cf45584e6c768fbfd SHA-1: 5dc3b02b925e2bab92966f9a07d18f38c67dd028 SHA-256: 02e14a179ecff04c34cb1a8eddc15f62cfa246bac1974cf17ef5672a6bc9bc2c
154 Risk Score

Malware Insights

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

The PDF contains a lure related to "funny kid test answers" which, when clicked, redirects to a malicious URL. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, suggesting a broader campaign to distribute malicious content or engage in SEO manipulation. The ML classifier strongly indicated maliciousness.

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=funny+kid+test+answers+sssniperwolf
    • http://files.electhicks.com/uploads/1/3/2/7/132740445/2501212.pdf
    • http://files.griderproperties.com/uploads/1/3/1/6/131606059/9bfd6.pdf
    • http://files.owlsendart.com/uploads/1/3/1/3/131384679/1556114.pdf
    • http://files.barringtonboosters.org/uploads/1/3/0/7/130738562/zovelesutemef_liraganefefe_jazom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2297/4117/files/budget_forms.pdf
    • https://cdn.shopify.com/s/files/1/0433/2870/0571/files/61869976437.pdf
    • https://cdn.shopify.com/s/files/1/0459/0433/0906/files/rewepiruraborewozuwaxas.pdf
    • https://cdn.shopify.com/s/files/1/0462/2182/0058/files/katilipezikikuwov.pdf
    • https://static.usrfiles.com/ugd/03f576_13dfcf3914c048b2a61ad52bbd6b1374.pdf
    • https://static.usrfiles.com/ugd/e481ce_a2bc24de237844e5b318a9d08e2c9558.pdf
    • https://static.usrfiles.com/ugd/fb5067_dfbf21f045844f92b64a7b758f3572c0.pdf
    • https://static.usrfiles.com/ugd/f68081_99376f94f5214a4e826b4f431b40a2bb.pdf
    • https://static.usrfiles.com/ugd/2f7815_18595b5100d8481293e861381efaaef4.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6663/files/38189140109.pdf
    • https://cdn.shopify.com/s/files/1/0437/5887/8881/files/schematic_design_estimate_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/lukorogimifelu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005db3.bin
ecf7995257adae5e49a6ede59585b31f7f0661ca933073f31fbc2bc14c4f454e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB3 5248 bytes
font_01_sfnt_off00006fbf.bin
8b604bd14fc86a37cef651dc24ae20a9f0fbb67ff8480332fe2d75d401a3dfae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBF 10724 bytes
font_02_sfnt_off00009474.bin
dc866944490878871c34987d85f1b18747c88a2fb8ee5d7801f6bac7253423eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9474 16364 bytes

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