Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9853870260cafba…

MALICIOUS

PDF

41.1 KB Created: 2020-08-30 23:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e45e2b9f89dcfa77239e9e95d05c534 SHA-1: c8dc71d7a516a15c273640a7f42293e03476122c SHA-256: e9853870260cafba655bf0fdfc06b42a03a9093711c476b260dc76421c976332
128 Risk Score

Malware Insights

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

The PDF file contains a prominent link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Unlocker 2 client samsung' and the malicious URL, suggesting a lure to download potentially unwanted software or malware. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a larger link farm designed to manipulate search engine results, further supporting a malicious intent.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/wix?keyword=unlocker+2+client+samsung
    • https://static.usrfiles.com/ugd/1d64af_dad5d4315eed47a9851e92206278d21c.pdf
    • https://static.usrfiles.com/ugd/11f207_0e55360f23474d228416747093298720.pdf
    • https://static.usrfiles.com/ugd/b8c837_2092503836ad4d3d90a26dd88a7877b1.pdf
    • https://static.usrfiles.com/ugd/538d67_35a03ec3c38d4232b9324c331af628ff.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/49689920154.pdf
    • https://cdn.shopify.com/s/files/1/0430/6498/3701/files/97025906230.pdf
    • https://cdn.shopify.com/s/files/1/0447/5263/4005/files/21239471384.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_4acec88601c74d08980b7fae80330e09.pdf
    • https://static.usrfiles.com/ugd/a382ee_fca5fcc921a9432bbd43cae9b2474109.pdf
    • https://static.usrfiles.com/ugd/fbccce_d7808136968740be9553c7ba172ffa6a.pdf
    • https://static.usrfiles.com/ugd/8cbfce_a399d329c2d94d909554d4201fefd1b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_1526747ca75a40349b438c9bd8466d4b.pdf
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/expose_sur_la_negritude_dans_balafon.pdf
    • https://cdn.shopify.com/s/files/1/0430/4607/6565/files/pibupuberugezowokejosoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/3415/5928/files/ignatian_retreat_guide.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_off000061c9.bin
b3ff18a803e8620033cd00f576ac438a872284e603b7b49637d309acc7cf6df7
pdf-font-stream PDF embedded font (sfnt) at offset 0x61C9 5304 bytes
font_01_sfnt_off000073ba.bin
76741f2c621e230f72263a3d29e2f5f0853ea074a442d0901adceade930860e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x73BA 10632 bytes