Malicious PDF — malware analysis report

Static analysis result for SHA-256 014a80ad70c8c78b…

MALICIOUS

PDF

42.9 KB Created: 2020-08-06 06:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 737cc11110bd7fe89046b03428f2a898 SHA-1: b47c9a2b5dfd7a4e56972a241d1fac58eb4e4f93 SHA-256: 014a80ad70c8c78bdb7affe0d6ebd3350b311b73e3b01a0d62da2ef305e70c22
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised as a certificate template. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies this behavior. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL.

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=certificate+of+participation+template+pdf
    • http://files.dynamicmgt.com/uploads/1/3/2/7/132741162/8a24d9.pdf
    • http://files.prepaidhomedeductible.com/uploads/1/3/1/3/131379236/3311985.pdf
    • http://kadixazo.texaslymealliance.net/uploads/1/3/2/3/132302921/tosevejomabomix-lirosake-naparimoki-gajaxejaj.pdf
    • http://files.westwindsfarmcolorado.com/uploads/1/3/1/3/131384127/2749634.pdf
    • http://files.fleenorfamilyadventure.com/uploads/1/3/0/7/130775134/voxijezo_bifirogoka_fixipaseket_bafowexinu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/xagezugorimijevusofo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/39725736783.pdf
    • https://cdn.shopify.com/s/files/1/0432/2086/1092/files/ritetemp_thermostat_models.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/81852924958.pdf
    • https://cdn.shopify.com/s/files/1/0433/6739/9575/files/masary_real_love.pdf
    • https://cdn.shopify.com/s/files/1/0431/4660/8794/files/vopatimaxuwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9410/5509/files/66621873067.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/15924440662.pdf
    • https://cdn.shopify.com/s/files/1/0438/2015/5042/files/tecnica_de_cateter_venoso_periferico.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6063/files/dusotojelilunapibuwasubi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/rovodopadumuxiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/5837/1496/files/76965457473.pdf
    • https://cdn.shopify.com/s/files/1/0431/0981/0343/files/xekabumuvotasugela.pdf
    • https://cdn.shopify.com/s/files/1/0433/7962/2040/files/61507715719.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b6f.bin
93c748870e40f090c5d095004072373e67b91582292feeca4fc01e38520309b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6F 5028 bytes
font_01_sfnt_off00007c73.bin
e0481863d132043f2dd8460e2774e50018ac9565a40278f4ce05e22b56fea1fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C73 9884 bytes

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