Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0030b99fb0c45e…

MALICIOUS

PDF

51.3 KB Created: 2020-08-14 11:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa292791abed1575e3c57641d687667b SHA-1: 536905ceeb31468603b9ae06c3f72a6c1b8f2580 SHA-256: ce0030b99fb0c45e11fd2f3cbe29c02e7dc347868644e3ae230e4ddec3828962
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with many links pointing to benign Shopify domains, but one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/wb?keyword=siti%20cable%20packages%20pdf%202019%20haryana, suggesting a lure related to package delivery notifications. The ML classifier strongly supports the malicious verdict.

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.ru/wb?keyword=siti%20cable%20packages%20pdf%202019%20haryana
    • http://files.pvrr.org/uploads/1/3/1/4/131438583/wexujuvemivojepipur.pdf
    • http://files.tonitarracino.com/uploads/1/3/1/1/131163953/1895503.pdf
    • http://najadasas.mesapack253.org/uploads/1/3/1/3/131383483/5509755.pdf
    • http://files.event-guru.co.uk/uploads/1/3/1/4/131406258/1456472.pdf
    • http://ronoxo.msingramcreations.com/uploads/1/3/2/8/132814282/744381882dfbc.pdf
    • https://cdn.shopify.com/s/files/1/0437/8787/8549/files/woviwubogux.pdf
    • https://cdn.shopify.com/s/files/1/0434/9929/0776/files/85973850349.pdf
    • https://cdn.shopify.com/s/files/1/0436/4845/0718/files/female_body_language_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/8178/4726/files/77007706576.pdf
    • https://cdn.shopify.com/s/files/1/0437/3456/5025/files/7236203850.pdf
    • https://cdn.shopify.com/s/files/1/0435/5738/8437/files/egomaniac_vi_keeland_romana.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/html_page_to_using_php.pdf
    • https://cdn.shopify.com/s/files/1/0441/1123/3176/files/bstc_answer_key_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6899/7288/files/6758509948.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71895612735.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7252/files/walabufavojivad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/bukofimajawapolifoxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5271/files/survey_of_accounting_6th_edition.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a79.bin
db4d4598fb4f76870533e6b1553636cc1e37c635355b83abb2b2aa749a4b93b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A79 6308 bytes
font_01_sfnt_off00008fe7.bin
a12ad22defcf9e089c7a9d67d10dfa2d85f680ba5924aaca9f76f6d02f785ad0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE7 15696 bytes

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