Malicious PDF — malware analysis report

Static analysis result for SHA-256 09196a63a3bfa01a…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 03:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22cb438f44be04a136ae475fd38f53fb SHA-1: 66b52a71ea87ffb1a5022befe34d3870582d40f2 SHA-256: 09196a63a3bfa01ac94481a32163650bb86dc61f5ca653a4a22b1238a1395de6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.cc, which is flagged as a malicious redirector. The document body and metadata indicate it was generated by wkhtmltopdf, suggesting it might be part of a larger SEO-based link farm or phishing campaign.

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.cc/wix?keyword=still+loving+you+drama
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0445/4963/6255/files/also_sprach_zarathustra_richard_strauss.pdf
    • https://cdn.shopify.com/s/files/1/0430/7314/2935/files/34755589859.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3205/files/school_bus_information_ocdsb.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/woseza.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4557/files/papastavridis_analytical_mechanics.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/lerisolorupowulivixikutu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/carbohydrates_metabolism_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6982/files/all_derivative_and_integration_formula.pdf
    • https://static.usrfiles.com/ugd/e73fea_7b8d77103d22434c98fdd115bebbfe9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_6542bf75d93e4f9884e5f9a695438c2a.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_6299e97498db41518fce42617831c91e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4891e5af8b2848b594073f2fefbcc7f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f55d30d1969493a8c846f735179d617.pdf
    • https://static.usrfiles.com/ugd/a107db_c553b0414c8d4d2c8e821a91221a4af6.pdf
    • https://static.usrfiles.com/ugd/b8c837_a80bb959ef0b4f749cae6bab4368bd40.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_off000067da.bin
5619310390ef2cfdfea595c968695e3f6a932da9d97082aa28474eea9842d694
pdf-font-stream PDF embedded font (sfnt) at offset 0x67DA 5232 bytes
font_01_sfnt_off00007992.bin
75a62bca1af796b60e61e393e243967c98c154995810b80cf97fbfebb3633f12
pdf-font-stream PDF embedded font (sfnt) at offset 0x7992 10440 bytes