Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fb2f60b064fcf3a…

MALICIOUS

PDF

32.5 KB Created: 2020-08-23 09:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2b6c2cde1166d2bdc643a9976b950fb7 SHA-1: f54a6c23373f6e36816cdb6edae8f471fb2d1c0e SHA-256: 4fb2f60b064fcf3af1a256e079cb07b8f693bde455585b294a81de62c259291f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM. The primary malicious URL identified is ttraff.com, which is used in conjunction with a keyword parameter. While many links point to benign Shopify domains, the presence of the redirector and the sheer volume of links suggest a malicious intent, likely to drive traffic to malicious sites or engage in phishing.

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=y.+s.+r.+c.+p+songs In PDF document text
    • http://suban.borough18mc.com/uploads/1/3/0/7/130739654/8858225.pdfIn PDF document text
    • http://walejupaz.serenescenesinc.com/uploads/1/3/0/8/130814328/felejimuxowofubuzag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3993/2067/files/23460539920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/13526656051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7238/8249/files/tudas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4816/3733/files/free_avastclear._exe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1099/6899/files/fgo_gamepress_halloween_2019_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/43800681193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3636/8283/files/c_pointers_objective_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/30639352907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/84564859939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/47294835975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4872/2851/files/shielded_twisted_pair_cable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/wulotelewijiratadatulegis.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000449d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x449D 4852 bytes
SHA-256: 2a2a2baaf8ef9f61a9afa9e7c0b436ce57e092ab41c98e679df2405a1d72962e
font_01_sfnt_off00005534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5534 9460 bytes
SHA-256: f126da0e7323b4732575b5f34302abe0565bdd444444db75a82336412da936bb

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