Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9fe5a29d615ff3…

MALICIOUS

PDF

37.5 KB Created: 2020-07-18 19:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac7be6f5a15cd75ca8819502a6bb3cc8 SHA-1: 37002748f61bd256c87a27a4f03eca564789a6d1 SHA-256: ce9fe5a29d615ff302b2301b61208dc3f27c4eab2b2e4d9f1c1a9d85dc969162
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. It also contains a PDF link farm heuristic, indicating a large number of external links, with the first being 'cdn.shopify.com/s/files/1/0433/0687/7080/files/dipudakafadaned.pdf'. The ML classifier strongly flagged this PDF as malicious. The document body appears to be corrupted or heavily obfuscated, but the presence of the malicious redirector URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wb?keyword=lks%20matematika%20kelas%206%20pdf
    • http://files.vivafitsb.com/uploads/1/3/2/8/132815183/7760605.pdf
    • http://files.halaaron.com/uploads/1/3/0/7/130775803/7530872.pdf
    • http://files.tinshedfarm.com/uploads/1/3/1/4/131406751/gaxafiwaken_ganovogupupexap_kilod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dipudakafadaned.pdf
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/30264050362.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/56183990552.pdf
    • https://cdn.shopify.com/s/files/1/0431/2878/3002/files/jipadafovevosilab.pdf
    • https://cdn.shopify.com/s/files/1/0431/6522/1028/files/sakebefuwuxevugir.pdf
    • https://fidedafekulo.files.wordpress.com/2020/06/lodawitujonugi.pdf
    • https://mosesozoju.files.wordpress.com/2020/07/41738732037.pdf
    • https://zifugamuk.files.wordpress.com/2020/07/verojujuxepejogunesup.pdf
    • https://jorelada.files.wordpress.com/2020/06/mofoxekafozuwupotagative.pdf
    • https://cdn.shopify.com/s/files/1/0436/3350/8512/files/64674544934.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/nufolagezuxusinutibavu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/zolosulajolusofor.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/58111104448.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6992/files/84386185596.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7982/files/zilosubadizelav.pdf
    • https://cdn.shopify.com/s/files/1/0427/7442/9852/files/nuruginifajimawavas.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/85833406859.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_off000056e5.bin
12e0c1ce778957af0bdba2cbf2b3b4487515ba7fe652432961523103bcc5c7a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56E5 4820 bytes
font_01_sfnt_off00006744.bin
c233a410eca39655cc12e430fd267baa07ca28825ff0ec5d90dec37f642bb90b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6744 9744 bytes

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