Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eaf7d961ae121c9…

MALICIOUS

PDF

39.2 KB Created: 2020-08-12 05:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae24540e9099145567d508409ef13cdf SHA-1: d3cfe580d380baf3764890e65075c6ae6f2480f3 SHA-256: 8eaf7d961ae121c99d7c20b92fdf4261e8e1bdab0a993627c844d27d09084899
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a job application. This heuristic, combined with the ML classifier flagging the PDF as malicious, strongly suggests a phishing or malware delivery attempt. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of numerous other links, many hosted on Shopify, indicates a potential link farm used for SEO poisoning or distributing further payloads.

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.com/wb?keyword=formasi%20penerimaan%20cpns%202019%20pdf
    • http://files.digitalliteracycookbook.org/uploads/1/3/1/3/131381802/kikipumupo-wenexufuw-mitarigegat-xafas.pdf
    • http://files.pigadvocates.com/uploads/1/3/2/8/132814241/tubuva-rizozoj-noxedopatizaler.pdf
    • http://files.littlecrabastrology.com/uploads/1/3/2/7/132740234/wogosugujugutelo.pdf
    • http://files.vcmilc.org/uploads/1/3/0/7/130775934/5952526.pdf
    • http://files.voitstudios.com/uploads/1/3/1/3/131380107/xofunejidulakelu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/67528705338.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/boboreg.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7491/files/pujikulusajevij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigirerunozekolufis.pdf
    • https://cdn.shopify.com/s/files/1/0438/4853/2128/files/8579322075.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/13323342524.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tepumesuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1397/9812/files/76594869278.pdf
    • https://cdn.shopify.com/s/files/1/0430/3886/7607/files/viwaxijasebak.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_off00005b0d.bin
6ed4b8f0aed02820a7a0fb2acda227330d695b6cc997a7ac5f2fab10dc931d1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0D 5708 bytes
font_01_sfnt_off00006e58.bin
f9cfd795502556fc998d929f7acee59e627cdcd7cd694552d1be3adc84e35858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E58 9848 bytes

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