Malicious PDF — malware analysis report

Static analysis result for SHA-256 101aa7c89261d6fb…

MALICIOUS

PDF

41.0 KB Created: 2020-08-28 22:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79c6fd51ce41baabd05b3e5be45077c5 SHA-1: 78a3d0c3ac6a71a6312bf2b5822dce3eec1873a6 SHA-256: 101aa7c89261d6fb64674a7c033a2620dbf707f267f54246c7b8c638ac8205ec
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document also exhibits social engineering lures related to installing browser extensions or updates to view content, and a QR code lure. These elements strongly suggest an attempt to trick the user into visiting malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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.com/wix?keyword=regla+cm+tama%2525C3%2525B1o+real
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8176/7848/files/90610192382.pdf
    • https://cdn.shopify.com/s/files/1/0433/8712/5927/files/46843523696.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/60687125134.pdf
    • https://cdn.shopify.com/s/files/1/0429/7470/7868/files/weeping_cherry_tree_planting_guide.pdf
    • https://static.usrfiles.com/ugd/b8c837_26bb621c7d8248298c8faafd44e75198.pdf
    • https://static.usrfiles.com/ugd/b8c837_33d8c61b388f47fc97ebbf1c00f5c01f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a275e4d28f764478b9dd137a609f409c.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fad1ec8506d492aa393b8ba15f0c18a.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bfe05a77a1b4d5eabd0d05d04a283b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_951804e42c4042118ffa12fd06bb8eed.pdf
    • https://static.usrfiles.com/ugd/b8c837_3279adcd308141108f647b98d0b30610.pdf
    • https://static.usrfiles.com/ugd/b8c837_70a1ffe7f8bc4e2f9c2a1297548aa03e.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_off0000605d.bin
cc9cb01e6b92f8af565f51b8f92061197579780a03682f1c96cef2452bf75d4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x605D 5160 bytes
font_01_sfnt_off00007199.bin
b411027201c8c36955c531245b24f9dc2ded4ed21bfc4cc4af7169630a96f6fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7199 10748 bytes

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