Malicious PDF — malware analysis report

Static analysis result for SHA-256 25484ec4835ce78e…

MALICIOUS

PDF

44.3 KB Created: 2020-08-06 07:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5ba85a93778b01d7c4956b93bd23af8 SHA-1: 82e15d0b846dd521e04012320775c7f1df925840 SHA-256: 25484ec4835ce78e68f89af78cb1676d42389084cb40503897d19c5ed0ec2a11
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body explicitly contains the URL 'https://ttraff.com/pify?keyword=creative+problem+solving+techniques+pdf', which is likely intended to lure the user into clicking it. This URL is designed to redirect to further malicious content, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The presence of numerous other links, including to Shopify domains, suggests a link farm or SEO poisoning tactic to increase visibility and clicks.

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.com/pify?keyword=creative+problem+solving+techniques+pdf
    • http://files.sheltiesalberta.com/uploads/1/3/0/7/130739267/tumajusidibugo_gajebumufa_zujekerewo.pdf
    • http://files.greysriversports.com/uploads/1/3/1/4/131452733/3888462.pdf
    • http://files.sheppartonspiritualistcentre.com/uploads/1/3/2/7/132740329/4298940.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/zuwobun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wifufokamavobopizevotug.pdf
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/49059516423.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/76626827754.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/zugotoviraxubi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4619/8683/files/almost_single_advaita_kala.pdf
    • https://cdn.shopify.com/s/files/1/0434/0744/2072/files/unity_event_manager.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/vamejefekif.pdf
    • https://cdn.shopify.com/s/files/1/0435/8511/0171/files/41521512559.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/lesutisegexunuwujizifub.pdf
    • https://cdn.shopify.com/s/files/1/0436/1663/2992/files/letasibiwuzenasunoribe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006440.bin
56337622d464addeadf2fa098e8ed3fd8efa96d73f894746ad88ba8cd6deac36
pdf-font-stream PDF embedded font (sfnt) at offset 0x6440 5800 bytes
font_01_sfnt_off000077ba.bin
1fda7262b9c322238461688d7b24ad83ee7204aef4f414443ce82fa7efbd087d
pdf-font-stream PDF embedded font (sfnt) at offset 0x77BA 1864 bytes
font_02_sfnt_off000080c7.bin
cfee2b9d3310cd8d95dc4c29672a220b59d9e9df8736e682061f55d522fddc48
pdf-font-stream PDF embedded font (sfnt) at offset 0x80C7 10364 bytes