Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc24b0e38527547…

MALICIOUS

PDF

41.9 KB Created: 2020-08-07 18:38:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff074ba1fcf6ccabdc5e9f12f77c022a SHA-1: b09642beeb4c629fb74f99c9684cc988d2a51e02 SHA-256: dbc24b0e38527547ade53b0940d40563c60333fb01912cc2c7bf0088a6841696
120 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 URLs but one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and text suggesting an academic paper lure. This indicates the primary goal is to redirect the user to malicious infrastructure via a deceptive link.

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.cc/pify?keyword=ielts+academic+writing+paper+pdf
    • http://files.crimsoncounseling.org/uploads/1/3/0/7/130740141/degeg.pdf
    • http://files.cbcorlando.com/uploads/1/3/1/4/131407164/dba28d114f83af.pdf
    • http://files.roadswell.com/uploads/1/3/1/3/131398292/ponalemega-dofowabojaworo-garanebil.pdf
    • http://files.shoplashmayhem.com/uploads/1/3/1/3/131398322/bimozepatuwodidok.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3204/files/schma_rgional_d_amnagement_du_territoire_maroc.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6396/files/mount_usb_drive_linux.pdf
    • https://cdn.shopify.com/s/files/1/0431/7613/2774/files/azure_data_factory_v2_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/93879804601.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/nitoladifarebodemoru.pdf
    • https://cdn.shopify.com/s/files/1/0432/9101/7374/files/37457956522.pdf
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/43603515604.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/rejukalifujosukorivele.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/34457283804.pdf
    • https://cdn.shopify.com/s/files/1/0432/9550/6592/files/58859981852.pdf
    • https://cdn.shopify.com/s/files/1/0430/0272/4506/files/wiluwurige.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/65683922856.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/rifuwipudazemavoler.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/
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065c2.bin
06de1f84361781562e12948ead938f06ef1aaa1038cbacd66c641077492b90ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C2 5504 bytes
font_01_sfnt_off00007879.bin
c07224d42e3f84c3456c064fff8b444d0687a50bc86e3e98e37c372ced413ec9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7879 9860 bytes

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