Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dba7a6e3901bb01…

MALICIOUS

PDF

43.5 KB Created: 2020-08-22 05:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afd04d0ae6f6e39612709757d9c44f50 SHA-1: d41354a42b1f9b8768d77a9767ba2dc29aca5ecd SHA-256: 8dba7a6e3901bb012df58b130edbab3ef7a4fef7775c7fd203bb33109096d62e
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged the document with high confidence. The presence of a link farm suggests an attempt to distribute malicious content or lure users to phishing sites. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=rock+a+bye+baby+lyrics
    • http://files.pilatessense.com/uploads/1/3/1/8/131858540/vejotubebu_marobegazupo_wevijepi_jevepodi.pdf
    • http://files.legaladvice2u.co.uk/uploads/1/3/0/7/130776486/zimerinopujalutedof.pdf
    • http://files.tatianasmithstkitts.com/uploads/1/3/1/6/131606121/2771781.pdf
    • http://files.acornsnw.org/uploads/1/3/1/3/131379236/sejibev.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1734/files/xazoxewivexa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/61529944385.pdf
    • https://cdn.shopify.com/s/files/1/0447/3857/6533/files/download_cracked_ipas.pdf
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/xowavijanuxisi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3253/files/99987777769.pdf
    • https://cdn.shopify.com/s/files/1/0440/1371/5606/files/calicut_university_bsc_computer_science_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/wuzosumofazizewowipod.pdf
    • https://cdn.shopify.com/s/files/1/0436/6182/0054/files/2780583236.pdf
    • https://cdn.shopify.com/s/files/1/0429/7120/1699/files/dozewo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/rejaj.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_off0000613a.bin
1465656e748470443812e3ed8bbc8057447f37867b4f94457bcde95136b48e7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x613A 4708 bytes
font_01_sfnt_off00007147.bin
30bb8847c33ac9a34574afb63943e5212ec67e6ecf6c3a9ff2a0b4b30773705d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7147 10064 bytes
font_02_sfnt_off00009396.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9396 4324 bytes

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