Malicious PDF — malware analysis report

Static analysis result for SHA-256 991e8f9fed6ba856…

MALICIOUS

PDF

38.8 KB Created: 2020-08-14 21:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d573fc6fcab746156876503acac61b6 SHA-1: d6bf09f16ff8f87fc6771c3586877040118fdf6e SHA-256: 991e8f9fed6ba8563a96931564700fc2b891545936f4f62dd55c47111fedd948
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=data+entry+sheet+in+excel+2007', suggesting a lure to trick users into clicking. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many hosted on cdn.shopify.com, which are likely part of a link farm to improve search engine ranking for malicious content.

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=data+entry+sheet+in+excel+2007
    • http://files.enghowe.com/uploads/1/3/2/6/132680905/kuxenovo-rasotojigafirab-zovutum-bopuduk.pdf
    • http://kideleg.smsyates.com/uploads/1/3/1/8/131856318/743d94d8950.pdf
    • http://files.illustrationpad.com/uploads/1/3/0/7/130775583/60d2ba971a953.pdf
    • http://files.paiboon.biz/uploads/1/3/1/4/131406762/1208977.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/50219521208.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/avast_antivirus_license_key_free_2038.pdf
    • https://cdn.shopify.com/s/files/1/0428/2236/9446/files/vejimapotire.pdf
    • https://cdn.shopify.com/s/files/1/0429/0566/5703/files/36183428355.pdf
    • https://cdn.shopify.com/s/files/1/0434/0734/3772/files/c_udp_socket.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/butosi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9434/files/arelik_klima_arza_kodlar.pdf
    • https://cdn.shopify.com/s/files/1/0434/7104/4770/files/68492375523.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_off00005a38.bin
a9baaa25df77bffdf23b61dd6902daa819ceae9856f026cb2534ed6cafa283c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A38 5408 bytes
font_01_sfnt_off00006ca6.bin
c982fcaf74543b2041cc8288c2b24ba13abb99f8e5d46a0c2c93f0a1f700f7c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA6 9932 bytes

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