Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e017c530f45f41e…

MALICIOUS

PDF

73.1 KB Created: 2020-07-28 13:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 761ef1050ce0ab2421523be6ab6682f2 SHA-1: e253f9595d785f0ed4a1f07301ef59c01483da6d SHA-256: 0e017c530f45f41e8aac1306d96bd2b8ad0d90c4b930f8bf5ef1513aadafcceb
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a journal article. The presence of many external PDF links further indicates a link farm or redirection strategy. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=journal+of+biogeography+pdf
    • http://files.northpalmbeachlife.com/uploads/1/3/0/7/130739697/bomutovipixojuriwo.pdf
    • http://files.thegovernorspub.com/uploads/1/3/0/7/130738614/mawabiwikaveza.pdf
    • http://files.candleendscottage.com/uploads/1/3/1/4/131453247/2545652.pdf
    • http://files.uglybugaboo.com/uploads/1/3/1/4/131437919/8f20523e1d13a88.pdf
    • http://files.complete-service-builds.com/uploads/1/3/1/4/131438312/novatovu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/gonap.pdf
    • https://cdn.shopify.com/s/files/1/0436/3714/5753/files/63965177117.pdf
    • https://cdn.shopify.com/s/files/1/0430/7002/9975/files/nukawogenejedowagupew.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/reditigifigoseb.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/61129967127.pdf
    • https://cdn.shopify.com/s/files/1/0435/5565/1743/files/nimaxonajumido.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2988/files/besogatademikitojofe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3543/4901/files/kevagixodiluvi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/23592225016.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_off0000e1c5.bin
a7f393e9c5b051ca37f063afa373ec70f643fd4feb532ff6c673ebb512b250ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C5 5160 bytes
font_01_sfnt_off0000f346.bin
d99f2a74b65401f72dbbf24aff05e715bb963f5cb1b8c472b7c9e913283b24b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF346 10632 bytes

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