Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f3f5af7ca95e91…

MALICIOUS

PDF

40.0 KB Created: 2020-09-05 21:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e888cc52dbcb981a10922693a530bb32 SHA-1: d2d7b7157889dc38699e5b940b21b44b3bd83169 SHA-256: 29f3f5af7ca95e9187d488d812af4b06a544e30563cf960ba58f1958b033e07d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The primary malicious URL is https://ttraff.cc/wix?keyword=sector+imperialis+painting+guide, which is likely used to lure victims into downloading further malware or engaging in phishing. The document body, though heavily obfuscated, contains references to this URL and a list of other PDF links, suggesting a link farm or redirection scheme.

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=sector+imperialis+painting+guide In 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/1/0437/3122/2689/files/25581964349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1070/9913/files/alto_saxophone_solos_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/uses_of_caustic_soda.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ec46b9046ca94cfe850ab314226bdc4f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/10a4aa_e54b2345ab174d33a5b1f4fd37f5e358.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_344ca839972241af9040982cd8c0b9eb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/eb6612_69c42efd930e4e258f2ccc3a1942ad4d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5e81b9_ececc327a86343db8d708c2ab5a7b345.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3826db_bb3f5ffb017c40d894e99eb3cefa51a2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a4d998_ae836144abe3490da48497505b8b24e4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9bd82e_7a0ced28f58f43ce967e6db118f43f6d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_7331cb75466f4d14ab4eec207a33c1d8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_29c4422ba14d45ce876f176104308f4b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/296484_694507af64574115afd834897d9e71ec.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_210ad9ca2e9c43c5b8f0f7d0234f14de.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_off00005da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA3 5496 bytes
SHA-256: abb71864fdbdd2a95529d6cd713fc6a0fb64f0937fca54239c5e825cb0dbc825
font_01_sfnt_off00007037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7037 10436 bytes
SHA-256: 260896de5c9f0d592df1d048d02ac34a14b89b74a1647d7b87b95f8efd6c614b

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