Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d9f2dae13e97b23…

MALICIOUS

PDF

46.1 KB Created: 2020-08-21 13:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 144f18a188c98a2fd0c1ab125102a598 SHA-1: 10caaaa6172b19ca2ddb6999b72ac8aeef7fdca8 SHA-256: 8d9f2dae13e97b23936aba055b8fcef22fa22152c35534f86ca619e2e4143303
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=forcepoint+ngfw+2101+datasheet'. Additionally, it exhibits a PDF link farm heuristic, with numerous external PDF links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains text related to 'Forcepoint ngfw 2101 datasheet', suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=forcepoint+ngfw+2101+datasheet
    • http://files.foxoildrilling.com/uploads/1/3/2/7/132740291/6966785.pdf
    • http://files.monasfamilyemporium.com/uploads/1/3/2/3/132302870/5871365.pdf
    • http://files.phjarchitects.com/uploads/1/3/1/4/131452794/4fc7dbdd6f67.pdf
    • http://files.dancedriven.net/uploads/1/3/0/7/130738921/weloba_xogilulu_tugizexa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/zisosomulomomesowa.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/binge_eating_disorder_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/jajog.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8427/files/83693519709.pdf
    • https://cdn.shopify.com/s/files/1/0432/8987/0491/files/wuvulevagapiwek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xedatojif.pdf
    • https://cdn.shopify.com/s/files/1/0435/5915/7921/files/9th_class_english_textbook_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0743/4142/files/expenses_invoice_template_word.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000655c.bin
304a6abbe9a4ae98d4870a98a33335672dec73ac703a01cf5e6d1d55786a524d
pdf-font-stream PDF embedded font (sfnt) at offset 0x655C 5544 bytes
font_01_sfnt_off00007842.bin
f962aa5ff84cd74b10a3d88dc42919537384aa89abdd641b6f7ad2666f29cc86
pdf-font-stream PDF embedded font (sfnt) at offset 0x7842 10880 bytes
font_02_sfnt_off00009d84.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D84 4324 bytes