Malicious PDF — malware analysis report

Static analysis result for SHA-256 4257e540518ef313…

MALICIOUS

PDF

39.9 KB Created: 2020-08-07 19:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a563bfd8e9fcbde0aa8e645a1d247165 SHA-1: bf63d073e7e3793d5c7a4f9b2a28cd5e9336a892 SHA-256: 4257e540518ef313947b970a0283160d72e5e81f4f077695de3c27ae22f73787
150 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files, indicating a link farm for SEO poisoning. One prominent link directs to a known malicious redirector at 'https://ttraff.ru/wb?keyword=duties%20and%20responsibilities%20of%20an%20administrator%20pdf'. This suggests the document is designed to lure users to malicious infrastructure under the guise of providing information.

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/wb?keyword=duties%20and%20responsibilities%20of%20an%20administrator%20pdf
    • http://files.gugulethusiziba.org/uploads/1/3/1/3/131381021/3349453.pdf
    • http://files.falkland.org/uploads/1/3/1/4/131452733/tawerewatozo_xatironexaw_vofil_detalefoborutiv.pdf
    • http://files.wastegyalstyles.com/uploads/1/3/0/8/130814126/wumujod-jewisomebenumad.pdf
    • http://files.techknowhawaii.com/uploads/1/3/1/6/131606694/zunebomuvu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0980/1365/files/wekisesojetubawapareberu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tijubijevuvikupox.pdf
    • https://cdn.shopify.com/s/files/1/0432/7266/7296/files/pdf_merge_tool_mac_os_x.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/8th_grade_life_science_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0450/9119/2985/files/alkaline_food_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0434/2169/6149/files/why_are_steam_downloads_so_slow.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/21074560920.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/15185059489.pdf
    • https://cdn.shopify.com/s/files/1/0449/5913/7951/files/conflitos_no_ambiente_de_trabalho.pdf
    • https://cdn.shopify.com/s/files/1/0428/5490/8071/files/77549058435.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_off00005e74.bin
c92fab3e942ae303ebd796e58a5a8c8907c6777d9407f024a99f3407c1e8a065		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E74 5324 bytes
font_01_sfnt_off0000707b.bin
9b41d97a41c143ed0356ed4fc891ce341dca36287c41f69d76ecb7e5700b4d50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x707B 10008 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.