Malicious PDF — malware analysis report

Static analysis result for SHA-256 75b902972de9df00…

MALICIOUS

PDF

38.4 KB Created: 2020-09-17 13:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac6e1b8a108ca8a9a1396a1f143f7bcb SHA-1: 189e6b4768711ee4bee03f8c8bd135548dd6a225 SHA-256: 75b902972de9df00ac235f28ceae808c58fb245153e3bb2953aeff6b9099ed1a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a malicious redirector link and a large number of external PDF links, suggesting an attempt at SEO manipulation or to obscure malicious activity. The primary malicious link is https://ttraff.link/wix?keyword=safari+guide+clipart, which is flagged as a known malicious redirector. The document body is heavily obfuscated and contains what appears to be junk data, but the presence of the malicious link and the heuristic firings strongly indicate a malicious intent to redirect the user to harmful 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.link/wix?keyword=safari+guide+clipart
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/kohler_a112._18._1_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6182/1092/files/acrylic_sheets_for_sale_dublin.pdf
    • https://cdn.shopify.com/s/files/1/0440/3465/4358/files/96252715790.pdf
    • https://cdn.shopify.com/s/files/1/0440/8059/5094/files/2685926923.pdf
    • https://cdn.shopify.com/s/files/1/0436/4104/5145/files/62767472674.pdf
    • https://cdn.shopify.com/s/files/1/0435/6128/7839/files/2006_yamaha_rhino_660.pdf
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/guvilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/xijizifobe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6999/7207/files/38235818029.pdf
    • https://cdn.shopify.com/s/files/1/0462/8529/1680/files/microsoft_word_for_mac_trial_version.pdf
    • https://cdn.shopify.com/s/files/1/0434/9827/4978/files/30927711522.pdf
    • https://cdn.shopify.com/s/files/1/0428/6968/6431/files/wexodereduvogurotevaporuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/1755/0499/files/zajisijodudokenob.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/valakakezekuva.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/famikusuvov.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_off000058a3.bin
32a7cf8cfb9e9e76cbfd327a27b16050e852b4f1f30bf9a7636eea503364a23a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A3 5248 bytes
font_01_sfnt_off00006a93.bin
1c1c015385ffc406fa641f945e2a8232997be0d06e1f7b7f4772fb9715127794		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A93 10064 bytes

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