Malicious PDF — malware analysis report

Static analysis result for SHA-256 7352f54b72bcc275…

MALICIOUS

PDF

46.6 KB Created: 2020-08-31 16:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3bfbad9c00410981f5fb5a733b7f92e SHA-1: 1823ac169611f214ee51e5bd7852b374e06668b9 SHA-256: 7352f54b72bcc2756703a9f10c12c83db1e13434a52b90b551e635a454b9d6a1
154 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. It also exhibits characteristics of a PDF link farm, with numerous embedded links pointing to external PDFs, many hosted on Shopify. The primary malicious URL identified is ttraff.cc, which is likely used to redirect users to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious content.

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.cc/wix?keyword=kunstformen+der+natur+von+ernst+haeckel
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/community_nutrition_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/1955/0370/files/ff14_buying_a_house.pdf
    • https://cdn.shopify.com/s/files/1/0430/5446/5175/files/83871588614.pdf
    • https://static.usrfiles.com/ugd/07625c_9ce08de5c040414ba8f745d816f635fe.pdf
    • https://static.usrfiles.com/ugd/a44510_d0928a0d46fb4c7bbd2585b8b7302635.pdf
    • https://static.usrfiles.com/ugd/e3834b_984e322ac70047b6b3efa7e6976e365e.pdf
    • https://static.usrfiles.com/ugd/b8c837_935f39ae9fc64dfdafd45904ef9bd08c.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_a7c2deb4db7f481eb169da1d0d87dd0c.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/32519914974.pdf
    • https://cdn.shopify.com/s/files/1/0436/9196/6617/files/walmart_corporate_responsibility_report_2017.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/6889427933.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/notupofopoxapujidoji.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/74355200113.pdf
    • https://static.usrfiles.com/ugd/b8c837_b78163a9bbf3495c8c4378ef908fa1d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_9484169f27cb4bb9ba43388afdc33d1b.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_off000076c5.bin
a8a3e8be6c4fa366b4661362759c6f336a3266d1f3c1370b5b9eb9fb8c5feaa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C5 5352 bytes
font_01_sfnt_off000088d6.bin
e9961476ead831df502632d802f2dc27ba94a1d77b02609212f79a70aa67b0f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D6 11396 bytes

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