Malicious PDF — malware analysis report

Static analysis result for SHA-256 35516e06581b6839…

MALICIOUS

PDF

60.7 KB Created: 2020-08-06 12:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abbb089c70e531712e011ca4397e27b8 SHA-1: 30d63d7788d2576e4ea99278267db668c0dcdef8 SHA-256: 35516e06581b6839ff08f059b2a5e32637033c9a9c08f05885a893f7c7260d73
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL and topic as the malicious link, suggesting a lure. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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/pify?keyword=define+economic+planning+pdf
    • http://kokekase.theexeterinn.com/uploads/1/3/2/3/132303035/bobalivosetetid_wusifa_xunoloja.pdf
    • http://files.hedcut.com/uploads/1/3/2/6/132695698/7130337.pdf
    • http://files.standrewskentct.org/uploads/1/3/1/3/131384401/ad1a68a.pdf
    • http://fixatel.mandarin4u-sd.com/uploads/1/3/1/0/131070767/9365c2f3d24.pdf
    • http://files.tinyhamsterpaws.com/uploads/1/3/1/4/131406202/f6f5a3c.pdf
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/temolibokivimabuso.pdf
    • https://cdn.shopify.com/s/files/1/0432/3983/3767/files/fukubijutadutoxuxozetex.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/xegamabufurer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pejolezogumulugadajo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1520/9123/files/htc_bootloader_unlock_apk.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/27932002644.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/96014044585.pdf
    • https://cdn.shopify.com/s/files/1/0434/8238/2502/files/10193382582.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7073/files/28846815519.pdf
    • https://cdn.shopify.com/s/files/1/0447/0043/4586/files/absite_questions.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/naxojaviweruvopove.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_off0000ae1e.bin
1dd2d0623c8446f1db11ae41b122f59c1af7f6fba827850526fc9c5744091d0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE1E 5200 bytes
font_01_sfnt_off0000bfc8.bin
ba3024c51e916861c252e0cf0ef0629af7180fd0fa8d6d8a82adad682afe4f2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC8 10704 bytes

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