Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8180d9869cf1881…

MALICIOUS

PDF

44.6 KB Created: 2020-08-13 21:19:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5955b59414bf84d627062d0e4f3c53ef SHA-1: f4ac95562c3ebc9221afe3138544388649950c5e SHA-256: d8180d9869cf1881fdfd8b4d0b917db308f6e5945a990a641c2675407e17b2d0
128 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a critical heuristic firing for a malicious redirector link. The primary URL, 'https://ttraff.cc/pify?keyword=bts+pneumonia+guidelines+2018', is identified as malicious and likely serves to redirect the user to a further, potentially more dangerous, destination. The document body also contains numerous links to external PDF files, suggesting a link farm or a method to obscure the true malicious intent. The presence of embedded JavaScript further supports the malicious nature of the document, potentially used for exploitation or further payload delivery.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=bts+pneumonia+guidelines+2018
    • http://zonixel.worldvision.com.sg/uploads/1/3/1/8/131857334/7774995.pdf
    • http://files.brightstonefarm.com/uploads/1/3/0/7/130775902/judebajesuwa.pdf
    • http://files.davejohnsoninteriors.com/uploads/1/3/0/7/130739084/seguwubafij_xajuzilezezopu.pdf
    • http://tadusub.annikascaketutorials.com/uploads/1/3/0/8/130815017/0b0ee487a7f.pdf
    • http://files.meteamusic.org/uploads/1/3/2/6/132681560/guvera_tigadob_tozuvanuj_lofibu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/19025816575.pdf
    • https://cdn.shopify.com/s/files/1/0433/3325/5323/files/76879672921.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/konekomegavodufirukup.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3079/files/ruvatigoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/2474/3591/files/93064960134.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8472/files/what_is_macintosh_hd.pdf
    • https://cdn.shopify.com/s/files/1/0436/7394/4217/files/braveheart_theme_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/dutetisoxusukusozume.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sigejorivuzogekos.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/85741589163.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9544/files/mr_coffee_coffee_grinder.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13139855908.pdf
    • https://cdn.shopify.com/s/files/1/0432/1856/7335/files/final_acceptance_certificate.pdf
    • https://cdn.shopify.com/s/files/1/0431/7629/6605/files/bestiario_hp_lovecraft.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_off00006ccc.bin
d600db1009784879944e8e66861fd865f9d4f5679c938b49a56d14174bb5ed75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCC 5752 bytes
font_01_sfnt_off0000804c.bin
9d4a9a734617a6b8071c53ae64bab472fc2818d0a4206bd394f1e60135acee83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x804C 10912 bytes

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