Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2807243d0729ad…

MALICIOUS

PDF

40.4 KB Created: 2020-08-04 23:34:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91e77a1ea50ac2ee9db8b451cb0476b7 SHA-1: 644f04680c4ec198c41a8c1ec96e08c7601bc5eb SHA-256: cd2807243d0729add2923e3fb661979f0df8a8294216fc46825f8c576850bf07
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one heuristic specifically identifying a link to a known malicious redirector. The document body text and embedded URLs suggest a lure related to 'pdf reduce file size online free'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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=pdf+reduce+file+size+online+free
    • http://files.ladieslearnenglish.com/uploads/1/3/1/4/131454345/werivufu-kudogef-boforo-dumigupitufalu.pdf
    • http://files.shomusbiology.com/uploads/1/3/1/4/131406841/dedivovax_weluzi_majumapirozanan.pdf
    • http://files.hangmansdrop.com.au/uploads/1/3/1/4/131453401/negabavarobugab.pdf
    • http://files.directorfitz.com/uploads/1/3/1/1/131164132/34e035e.pdf
    • http://files.amandaseddon.com/uploads/1/3/0/9/130969358/7de5e74f48f.pdf
    • https://cdn.shopify.com/s/files/1/0436/7079/8489/files/tezafimewapagefufamev.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6110/files/48448755653.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/zokopegesoxubiponev.pdf
    • https://cdn.shopify.com/s/files/1/0438/4702/4805/files/mezogozivusivitegovim.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/stp_oil_filters.pdf
    • https://cdn.shopify.com/s/files/1/0433/8165/3655/files/76965625022.pdf
    • https://cdn.shopify.com/s/files/1/0430/7399/4905/files/71682940658.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/mercury_4hp_outboard_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4577/2698/files/tusoxevubaduwuside.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_off000060ad.bin
917337b1762662366ef5e3da332dbb6fa814ae771fbb6fe08eae8828e73edbb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AD 4856 bytes
font_01_sfnt_off0000714b.bin
c526e9358dea3e2709aecaa8ba87bc45fa32f7608b7ebd197eb6064bf76c95cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x714B 10416 bytes

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