Malicious PDF — malware analysis report

Static analysis result for SHA-256 a71708a0ea211bd9…

MALICIOUS

PDF

39.6 KB Created: 2020-08-22 03:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5464616afbadc0d6a10ed54c96a7bef6 SHA-1: ac7d58516f33b3fcf30365d7257447d9423ca3e3 SHA-256: a71708a0ea211bd99b9cb7b24f7541db943f1ae78d611a504e37ff956acfcd67
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a mass of external links, many of which are hosted on Shopify, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to obscure the final destination. The document body contains a query about sorting Excel worksheets, likely a lure to make the malicious link appear legitimate. No scripts were extracted, but the presence of a malicious redirector and a link farm indicates a phishing or malware distribution attempt.

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=can+i+sort+excel+worksheets+alphabetically
    • http://files.gunkhoney.com/uploads/1/3/0/8/130813357/kukivotuxitujanad.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/betternet_pro_apk_onhax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/26372720076.pdf
    • https://cdn.shopify.com/s/files/1/0461/0424/8484/files/84126615598.pdf
    • https://cdn.shopify.com/s/files/1/0432/7247/0686/files/66348957703.pdf
    • https://cdn.shopify.com/s/files/1/0437/9849/5389/files/fagalabamolobepininejawat.pdf
    • https://cdn.shopify.com/s/files/1/0432/4353/6552/files/beemovie_2017_apk.pdf
    • https://cdn.shopify.com/s/files/1/0443/0397/4556/files/google_chrome_dev_apk_mirror.pdf
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/vuguzuruwemexopanepom.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/almost_is_never_enough_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36149341097.pdf
    • https://cdn.shopify.com/s/files/1/0452/7511/9778/files/algebra_2_book_mcgraw_hill.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/30547510987.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_off00005df2.bin
2ba96cffed7286ce7f925ff0ea41b7f65d3645d2e9fcab8daf9d22c1e82c3f68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF2 5392 bytes
font_01_sfnt_off00007056.bin
2e52a387a6ebaf5ae69a53668c14346c273664741f6ac79210b1033019233b0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7056 9800 bytes

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