Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6c102d4a918dcb…

MALICIOUS

PDF

39.2 KB Created: 2020-08-04 13:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7dbe54db9333d5a93309ecf1d4f932a SHA-1: d6df8bfe6a07350d5799568ef24232b993ee22b3 SHA-256: db6c102d4a918dcbc0ad593928f0c9dd6ba5d2723faddcc84df6a2b928865eb1
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to manipulate search engine results, with a primary link redirecting to a known malicious domain. The document body is obfuscated but contains the malicious URL, suggesting a lure to a phishing or malware distribution site. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious redirection attempt.

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.ru/pify?keyword=concepto+de+anualidades+en+matematica+financiera+pdf
    • http://files.epeterswriting.com/uploads/1/3/0/7/130740596/xakifuguwa_devowi.pdf
    • http://files.rumble-records.com/uploads/1/3/0/7/130739470/5886846.pdf
    • http://pogup.swisscompleteeyecare.com/uploads/1/3/1/4/131407558/1631429.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/nejenosajulow.pdf
    • https://cdn.shopify.com/s/files/1/0437/3869/3797/files/vufisidigimogikironi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/wamekaferebadorobiwuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6265/7177/files/vufetapezabunatetalol.pdf
    • https://cdn.shopify.com/s/files/1/0430/8022/0826/files/wodesiwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2322/0392/files/mendelssohn_violin_concerto.pdf
    • https://cdn.shopify.com/s/files/1/0433/7755/7660/files/35388517113.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwofejimu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9622/files/virutikonubufofo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/nezarejakami.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_off0000569e.bin
29293ea57d35fd31e9fe16626a0a90e3a55c6075df5aaa1da9d48ebf4b786965		 pdf-font-stream PDF embedded font (sfnt) at offset 0x569E 5208 bytes
font_01_sfnt_off0000683b.bin
81989c8827df9b4958c3823127ed01192e45bd6a43a3f9cc5b4c685bd7fe6f42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x683B 11644 bytes

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