Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25b6037f073dddd…

MALICIOUS

PDF

40.0 KB Created: 2020-09-02 08:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5bd1aa8c266c806a7114f65994d2d52 SHA-1: a0c8b59a874652339711de927527cd37e35ceadb SHA-256: f25b6037f073dddd7078151517d69885417d401aee56cbfb18a39311fc910752
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to deliver a payload. The document also features a link farm to numerous other PDFs hosted on static.usrfiles.com, suggesting a SEO poisoning or traffic generation scheme. The presence of a visual download button further supports the lure to click the malicious link.

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.cc/wix?keyword=sounds+pronunciation+app+premium+apk
    • https://static.usrfiles.com/ugd/e8e253_6140f0b03f314468b896681074e9b3bb.pdf
    • https://static.usrfiles.com/ugd/510691_2c3898d1fc9f46f09ea92223951233a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_fae4bc71b46c44b0aae9655d242d7e39.pdf
    • https://static.usrfiles.com/ugd/0c268c_c1430db81f6e4ecfbb1faa08642224d4.pdf
    • https://static.usrfiles.com/ugd/71fd01_0488429ff4324e098871f07d3778a8ab.pdf
    • https://static.usrfiles.com/ugd/a771bd_04749c454e6d4ea48ffe1dc7d84c26b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c73295986d444f3382ac896738b636b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ec4c17ae9014076ab6ccb8166437399.pdf
    • https://static.usrfiles.com/ugd/b8c837_56a93c25b40a4abdb5888578d90f060e.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_cf31ccf781ed48d18365d7a02c9f1aac.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/cavendish_university_fees_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/buoyancy_effects_in_fluids_turner.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/career_values_scale.pdf
    • https://cdn.shopify.com/s/files/1/0435/2668/4824/files/bojetodomoparebo.pdf
    • https://cdn.shopify.com/s/files/1/0436/6322/9078/files/33054389396.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_off00005c3a.bin
b92a468beb49d73872ef4995535164f0f37a88dfc0caf447ee9e09cb6d509305		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3A 5356 bytes
font_01_sfnt_off00006e59.bin
7ce1261a1a0ca5d3e7730c5b184439dc008a9727cfeac666fb0dbfaa39ee546c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E59 10856 bytes

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