Malicious PDF — malware analysis report

Static analysis result for SHA-256 02efd9610765e27f…

MALICIOUS

PDF

40.1 KB Created: 2020-08-03 12:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 042d0bf5468c5fbc595896e723dd6550 SHA-1: 2a9ff4908207aeaf822cd7183ed3fc635bb6a1d6 SHA-256: 02efd9610765e27f14654d67a1d7b9a67861e5b68260cc0f6b1cc3a993d33a3a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a malicious redirector at 'ttraff.com'. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL confirms a malicious intent to lead users 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.com/pify?keyword=rational+function+domain+and+range+pdf
    • http://files.cozykidsembroidery.com/uploads/1/3/1/4/131409170/ninebafakafekip.pdf
    • http://files.charitycora.org/uploads/1/3/1/4/131407980/xigitibarawasad.pdf
    • http://files.simplynurturing.com/uploads/1/3/0/8/130874587/ec4e50.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/favodobuvame.pdf
    • https://cdn.shopify.com/s/files/1/0449/9108/6750/files/go_you_chicken_fat_go.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/94004947802.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/3837764210.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/zodijikumu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3917/8399/files/90468807769.pdf
    • https://cdn.shopify.com/s/files/1/0429/7683/7785/files/babimutodewebarimapidum.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/80738106565.pdf
    • https://cdn.shopify.com/s/files/1/0441/3777/5256/files/furidojofixak.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/additional_command_line_arguments_overwatch.pdf
    • https://cdn.shopify.com/s/files/1/0431/9644/8917/files/bamafidanimipuko.pdf
    • https://cdn.shopify.com/s/files/1/0445/9554/4228/files/mestrenova_license_file_crack.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.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_off00005d5b.bin
93ae99af4c8b5bc6a4a7f5b33ed65e1d23bd323a9440bc0ece316c738dfb134b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5B 5304 bytes
font_01_sfnt_off00006f5c.bin
3571ecb78df3c311d1ca7be44b2d390bbc06fe59fa2d361827e150b9b07ef12e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5C 10716 bytes

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