Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e376675a1335f7f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-10 06:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f66af3d36d077275fa81b5d73a81468 SHA-1: 6ebe1620f6bb85730df4b06f27909e2b625c9269 SHA-256: 4e376675a1335f7f896d19b2d1917487f98c2f22742c0f0d50b10409860e3b08
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious payload delivery mechanism. The document body text, though partially garbled, contains the phrase 'Annotate pdf apple pencil', aligning with the lure used in the malicious redirector URL. No scripts were extracted from this sample.

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.com/pify?keyword=annotate+pdf+apple+pencil
    • http://files.sophie-eleanor-photography.com/uploads/1/3/1/4/131407148/zonatezosaxure.pdf
    • http://files.paqu.org/uploads/1/3/1/8/131871894/vibofukupu_ruzererijolibij.pdf
    • http://pomup.joelemireart.com/uploads/1/3/0/9/130969723/69cf78b48.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32296476761.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0081/files/retok.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/62864308506.pdf
    • https://cdn.shopify.com/s/files/1/0431/0728/7206/files/forolomexofikopupedob.pdf
    • https://cdn.shopify.com/s/files/1/0429/9233/7059/files/4405826364.pdf
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/neninaxupowuwinuza.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/91578550411.pdf
    • https://cdn.shopify.com/s/files/1/0438/3830/8512/files/cambridge_medical_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7207/files/molecular_genetics_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8929/files/d3_patch_2._3.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/33190463978.pdf
    • https://cdn.shopify.com/s/files/1/0436/0064/2211/files/jutaxuxulagosagatewogala.pdf
    • https://cdn.shopify.com/s/files/1/0435/6793/9743/files/dugutoguwinewodufise.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_off000067e3.bin
8ceb04371b1ab578fc17e3ac5388d6d6db8f46e5b5251e095fafdeb63ecbffb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E3 4864 bytes
font_01_sfnt_off0000788c.bin
c92ebdc512fa9b840a66b82c5c897391e4b1509abef40428a9265f35f58db48e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x788C 9884 bytes

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