Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67d2f3021384da9…

MALICIOUS

PDF

47.2 KB Created: 2020-08-05 03:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3d08ad266253f890206d4dc3c6f7567 SHA-1: 10adb63ef8fb43596fce8cc0a1dbe950d3075833 SHA-256: d67d2f3021384da9d29b92bc9842c87c4dfda9eb07123bb7a4f5217daa1dfc0f
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to benign content, but one critical link to a known malicious redirector at `https://ttraff.ru/pify?keyword=tuberculous+lymphadenitis+pdf`. This indicates a likely attempt to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=tuberculous+lymphadenitis+pdf
    • http://files.editiononegallery.com/uploads/1/3/2/3/132303286/b202e32.pdf
    • http://files.caitlinmaeshepherd.com/uploads/1/3/1/4/131406234/vagokovewol_tevitaz_zokip.pdf
    • http://files.rivertowniga.com/uploads/1/3/1/4/131409055/3352573.pdf
    • https://cdn.shopify.com/s/files/1/0436/9242/5384/files/essential_university_physics_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/8985/2568/files/comment_briser_les_liens_ancestraux.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0514/files/8142757210.pdf
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/python_read_json.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/system_dynamics_3rd_edition_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/microsoft_xna_framework.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/lexirijopumixarakap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdf
    • https://cdn.shopify.com/s/files/1/0438/4092/9957/files/free_change_order_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/61134857455.pdf
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/tuputolomugepetajenajer.pdf
    • https://cdn.shopify.com/s/files/1/0431/8812/5857/files/42714342551.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6072/files/kosefubenofukejajelemozu.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_off000079e6.bin
ba58402d9104dd12de6350b51a2bb130e70a6982ba00ec97b9a09d1d2fc00078		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E6 5588 bytes
font_01_sfnt_off00008cb8.bin
8c36a7291a7c528d071a971339fabe15a7fd806278e8d0c40f6ba2a17c4f301e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB8 10304 bytes

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