Malicious PDF — malware analysis report

Static analysis result for SHA-256 1543f336bf210d12…

MALICIOUS

PDF

48.8 KB Created: 2020-08-29 05:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f139db8bbaf64a123ef6ca413e0898a SHA-1: 9bd662f0b4da8879c74debb9bf25ef64aa8f995b SHA-256: 1543f336bf210d121b49fcc3ab958e2946e679960e1a6d6636e52a807717caec
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, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the PDF is designed to trick users into visiting a malicious site, likely for phishing or to download further 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.com/wix?keyword=macroeconomia+parking+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9693/2501/files/sherlock_holmes_deductive_reasoning.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/75931680088.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5479/files/7253170147.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/35025730378.pdf
    • https://cdn.shopify.com/s/files/1/0429/3971/1655/files/rolosorumori.pdf
    • https://cdn.shopify.com/s/files/1/0434/6609/6806/files/99419258428.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/68607355394.pdf
    • https://cdn.shopify.com/s/files/1/0437/1808/2711/files/injury_reporting_system_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/0596/7527/files/niruviwezujotisuseganopu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2185/8973/files/muzexujekezinevez.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/vigirosim.pdf
    • https://cdn.shopify.com/s/files/1/0432/2403/9592/files/mezadelapekusawepexof.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/76953711890.pdf
    • https://cdn.shopify.com/s/files/1/0437/8938/5885/files/algebra_1_common_core_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/ketosu.pdf
    • https://cdn.shopify.com/s/files/1/0439/1088/9624/files/sejegebiseg.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/wakuwe.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_off00007f96.bin
c8d3e91d7bf0cf0936570078c056052d16bf492a728becd33a6167f74c2be26b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F96 5332 bytes
font_01_sfnt_off000091a5.bin
a4e4c8a933ffe55a7a25fe2d31b0090f611de11dbef570aebdb184dafdf68a1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91A5 10692 bytes

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