Malicious PDF — malware analysis report

Static analysis result for SHA-256 01029dd6cc5eb523…

MALICIOUS

PDF

38.1 KB Created: 2020-08-23 18:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55c9536051844e20e12f30ba05f13f4f SHA-1: c5589b2fc45d0027c61de8e60677e4e164bc111a SHA-256: 01029dd6cc5eb5231a104ca791c3966788be8bb14059cbb72800509061f72636
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL identified is https://ttraff.cc/pify?keyword=percent+error+questions+and+answers, which is known to lead to malicious infrastructure. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a deliberate attempt to lure users to malicious sites under the guise of providing information.

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/pify?keyword=percent+error+questions+and+answers
    • http://kefukuve.chicoholisticpet.net/uploads/1/3/0/7/130775291/7146200.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/asme_y14._38m_abbreviations_and_acronyms.pdf
    • https://cdn.shopify.com/s/files/1/0431/7537/9101/files/98464385756.pdf
    • https://cdn.shopify.com/s/files/1/0447/9621/5456/files/drake_tax_software_support.pdf
    • https://cdn.shopify.com/s/files/1/0435/8979/5998/files/petetovonojibivor.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/fifojekujumarasedazo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/blasting_equipment.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/ca_dmv_form_262.pdf
    • https://cdn.shopify.com/s/files/1/0433/7955/6504/files/30790408717.pdf
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/3d_warehouse_no_files_are_available.pdf
    • https://cdn.shopify.com/s/files/1/0437/9413/7249/files/boxuwuzosusudozasag.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_off00005593.bin
2a8256d9b611fcdc903fd0f5f6f85e494dc83eaacfafd9abaecb86cd9c309d4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5593 5120 bytes
font_01_sfnt_off00006711.bin
bfd4eca58107467d04dad818fbcef708777a499c5b04cbe1699c774c8efa7f75
pdf-font-stream PDF embedded font (sfnt) at offset 0x6711 10280 bytes