Malicious PDF — malware analysis report

Static analysis result for SHA-256 920bdbbbb11b91a8…

MALICIOUS

PDF

43.3 KB Created: 2020-08-12 10:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b68f15bab13194aa916515debd352a10 SHA-1: 209d3188d72e3ae0c16eb69867ba9c4a011ef1ee SHA-256: 920bdbbbb11b91a8e64f2051d018a0938f923e7eaa201b6a9dc3da88d77a046e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link redirects to a known malicious infrastructure at 'https://ttraff.cc/pify?keyword=penyakit+ascariasis+pdf'. This suggests the document is designed to lure users to malicious content under the guise of providing a PDF about a medical condition. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=penyakit+ascariasis+pdf
    • http://files.chainofeventsbw.com/uploads/1/3/1/8/131857115/wotokafepoxukusap.pdf
    • http://jejuwuwas.osatelegraph.org/uploads/1/3/1/3/131383790/fibatofomu-viloko-dinexogazab-kejip.pdf
    • http://sitoxotu.bewellacupunctureclinic.com/uploads/1/3/1/3/131384169/becce57c.pdf
    • http://gaxevo.skylineeaglesfootball.org/uploads/1/3/0/7/130776262/e2c4b52cc.pdf
    • https://cdn.shopify.com/s/files/1/0440/5365/9798/files/25019918278.pdf
    • https://cdn.shopify.com/s/files/1/0437/0127/2729/files/41946323687.pdf
    • https://cdn.shopify.com/s/files/1/0434/3840/7845/files/absceso_pilonidal_tratamiento_antibiotico.pdf
    • https://cdn.shopify.com/s/files/1/0429/8476/7641/files/kitazenixebabawefolivos.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/taritewafewarixalinapexem.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2327/files/analytical_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8343/files/96477467484.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/advantages_and_disadvantages_of_captive_insurance.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4496/files/electronically_sign_acrobat_pro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lejozusuxawunulimedobina.pdf
    • https://cdn.shopify.com/s/files/1/0434/2880/6807/files/gta_vice_city_san_andreas_cheats.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_off00006aa3.bin
7b1568f5bb475fdbfaa2e1b022698f22b7116eec335f1e4bc2e1d404249a4b66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA3 5284 bytes
font_01_sfnt_off00007cac.bin
d364b3f02b0ab1d40fcb2b20002ef641072679e3050843c1730a43363d101b26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAC 10848 bytes

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