Malicious PDF — malware analysis report

Static analysis result for SHA-256 25b232479fa1c19f…

MALICIOUS

PDF

48.6 KB Created: 2020-08-10 08:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab8bd4bc206daa94f80c1f8aeae64a78 SHA-1: 7fdec88052795828702d380a9f6ff3287c684ed3 SHA-256: 25b232479fa1c19ff3020632f97d172ce3af9aec2f24c31e9b8d8b1fd4b80ed1
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the text 'Pediatric cases for medical students pdf' and the malicious URL, suggesting a lure to download or view content. The primary malicious IOC is the redirector URL which leads to further malicious infrastructure.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pediatric+cases+for+medical+students+pdf
    • http://files.fullcirclearts.org/uploads/1/3/1/4/131407406/jadukakunegadewesa.pdf
    • http://files.the-sas-mom.com/uploads/1/3/1/8/131857970/pugezem.pdf
    • http://kuwerizag.alwaysanindian.com/uploads/1/3/1/3/131384635/556921731f6.pdf
    • https://cdn.shopify.com/s/files/1/0438/8149/6744/files/zudat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67768868558.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7749/files/pitari.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/screensavers_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0430/8634/8450/files/80123745491.pdf
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/waves_mercury_crack.pdf
    • https://cdn.shopify.com/s/files/1/0437/3043/6247/files/75985762839.pdf
    • https://cdn.shopify.com/s/files/1/0428/8066/3705/files/teacher_peer_evaluation_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7254/files/minecraft_middle_earth_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/4235/6904/files/gisadilakisefujejemuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/55992814467.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_off00007dc7.bin
24a8180725fb979506858fec2990f57622f1cadcb704984e7da65371da58058d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC7 5300 bytes
font_01_sfnt_off00008fbb.bin
2f91e11ebf808a7697e7833f6c0fcd64831877e2093d4888605f2eeb1c3c3734		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBB 11324 bytes

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