Malicious PDF — malware analysis report

Static analysis result for SHA-256 07132a25b1dfdceb…

MALICIOUS

PDF

56.9 KB Created: 2020-08-14 03:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1040459be2931c1fd6bd4a9b2f36a86c SHA-1: d2c1d564c975635c22cf50546ee0e863097c62bf SHA-256: 07132a25b1dfdceb7ee119c742063b24d7123ad8a6efa4c233165c47e0a599a5
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed to lure users with a marriage biodata format. The heuristic firings indicate the PDF is a malicious redirector and part of a link farm, aiming to drive traffic to potentially harmful sites. While no scripts were extracted, the presence of numerous external links suggests an attempt to lead the user to a malicious payload or phishing page.

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/pify?keyword=marriage+biodata+format+for+muslim+girl
    • http://nojotek.fiveoaksbeef.com/uploads/1/3/1/4/131438096/1837530.pdf
    • http://rebokoxo.servantsheartministry.org/uploads/1/3/1/1/131164250/9641a89.pdf
    • http://files.gifturite.com/uploads/1/3/0/9/130969190/083e05eedd9bdfe.pdf
    • http://files.creatingmathsuccess.com/uploads/1/3/1/0/131071298/7f65e8bb5615c69.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1796/8543/files/bikig.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1159/files/34603972705.pdf
    • https://cdn.shopify.com/s/files/1/0430/3575/4650/files/16149335100.pdf
    • https://cdn.shopify.com/s/files/1/0431/0292/9047/files/nuxowesojowelexonixuzudux.pdf
    • https://cdn.shopify.com/s/files/1/0435/9123/7791/files/simplify_algebraic_expression_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/paturivomizusozitakak.pdf
    • https://cdn.shopify.com/s/files/1/0441/2784/6552/files/leluka.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6726/files/quantitative_aptitude_tricks_and_shortcuts_free_download_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0438/9237/5704/files/zenawegovukewe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9868/6119/files/the_dead_poets_society_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/66533888757.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/tazif.pdf
    • https://cdn.shopify.com/s/files/1/0436/5638/0574/files/youtube_old_layout.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_off0000a167.bin
ad7f4f97d90ff1a34a691b3a618b5e196a98e81cf06eef54f7f34ec485d6c067		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA167 5372 bytes
font_01_sfnt_off0000b395.bin
140b54bcfd3141340d7de2eed58510c67e76fade22a52d11c01f9b6ebbe57720		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB395 10060 bytes

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