Malicious PDF — malware analysis report

Static analysis result for SHA-256 56247fa88c246f0e…

MALICIOUS

PDF

38.7 KB Created: 2020-08-24 10:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a15ac11d8de9c3e9175bf4df69b6842 SHA-1: 30c3f5c4dfe19f605b4775bd6110e6bca09d65d2 SHA-256: 56247fa88c246f0e37d6133858211003b05587c07d0bb38a2b863dd6b48e760b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body text, though partially corrupted, includes the phrase 'Twitter icon black' and the malicious URL, suggesting a lure to a malicious site. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of links to known malicious infrastructure.

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=twitter+icon+black
    • http://files.kansasturfgrassfoundation.com/uploads/1/3/2/3/132303382/kisut_lodut_jedoku.pdf
    • http://diwejenu.riversidecommunityplayers.com/uploads/1/3/1/4/131407818/kewofutafi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4922/9220/files/40999258808.pdf
    • https://cdn.shopify.com/s/files/1/0437/1283/9834/files/85776769466.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0810/files/fidijesajew.pdf
    • https://cdn.shopify.com/s/files/1/0438/1815/6192/files/bloom_s_taxonomy_domains.pdf
    • https://cdn.shopify.com/s/files/1/0429/1854/3523/files/17168263726.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0954/files/guvitujenitevamenulateti.pdf
    • https://cdn.shopify.com/s/files/1/0433/3525/4171/files/fevamepanubodigeto.pdf
    • https://cdn.shopify.com/s/files/1/0437/7555/7793/files/unity_invoke_with_parameters.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7189/files/96996921090.pdf
    • https://cdn.shopify.com/s/files/1/0439/8101/3150/files/nuxororare.pdf
    • https://cdn.shopify.com/s/files/1/0433/4547/7783/files/18987516886.pdf
    • https://cdn.shopify.com/s/files/1/0438/1619/0112/files/jinabagepuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/juvukitexonesusegakelib.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_off00004b2e.bin
4ace59389268611e7dc5d5c4aef9326120531e564ca77b5e2c0d6c05e0f88c7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B2E 4648 bytes
font_01_sfnt_off00005b09.bin
b64f79b545629c9813ba3bc307329145a3e5e84a41f3f04120ffd36074b10909		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B09 11324 bytes
font_02_sfnt_off00008017.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8017 4324 bytes

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