Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c40bf9ce9e71b5…

MALICIOUS

PDF

169.1 KB Created: 2020-08-26 19:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0199a5f48a79310ab3dd37163d038970 SHA-1: 828a5bfa6c3453b5fbc5d8bf722ab16d47fd8aae SHA-256: 16c40bf9ce9e71b50b407a68b2cbab02b97af509766f41c832630c85c6b210cd
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.link, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a lure. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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/pify?keyword=roots+of+the+russian+language+an+elementary+guide+to+worldbuilding In PDF document text
    • http://files.shotwellsharkband.com/uploads/1/3/2/6/132681033/diramad_vegikakafuzamu.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/1/0434/8451/2418/files/zimedatikokivafegarotefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/81780437688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/tagudurobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9880/8224/files/yard_sale_pricing_guide_jewelry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1952/5531/files/resume_cover_letter_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tizerosotusalasebix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5771/6127/files/release_plan_template_scrum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/rajak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7273/2836/files/45778252504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5710/9399/files/xuzofaravumazafowida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8820/7254/files/ppt_atonia_uteri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/75764291373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4487/2090/files/zanuduzematipam.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23D43 5664 bytes
SHA-256: 9060243c567ae292757e551233dba369313e2d0565cd09f547d5fcaa0284bc81
font_01_sfnt_off0002507a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2507A 14660 bytes
SHA-256: 96b4b9f0577e5794c1fe89c5510abbac5c84e3ac3acbfd4cb38bc28b20ca7047
font_02_sfnt_off00027e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27E8B 16168 bytes
SHA-256: 272e514f9476ad5cd2c4d41db085ae12b690bbce6a01a77bc2293bec534ca399

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