Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b58ffc75fc784d…

MALICIOUS

PDF

31.6 KB Created: 2020-08-31 22:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbc89e62aece093b181f16f18526b9ea SHA-1: de48c5c879234fa5ac588d8ebc38c7683ffd314f SHA-256: f5b58ffc75fc784d9bc9682bb764541a191eb5921b7cdac04ba1bdf8adeca045
92 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting a lure for a movie download, which is a common social engineering tactic. The primary IOC is the malicious redirector URL.

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.
  • 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=ambarsariya+full+movie++mp4+hd
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/inhalation_route_of_drug_administration.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7417/files/pupadawiginidukab.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3028/files/49495605416.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e05623e3ceb464f836ccff069055db1.pdf
    • https://static.usrfiles.com/ugd/a91264_13dbc932ce9249e0a74dd921e9c010bc.pdf
    • https://static.usrfiles.com/ugd/865d50_bf91b8b63ebc401ea19869ce2fd23aa5.pdf
    • https://static.usrfiles.com/ugd/c12414_3d8d7eeaaa174c1eae374b78f10e8178.pdf
    • https://cdn.shopify.com/s/files/1/0431/7816/4384/files/arthrobacter_globiformis_iso.pdf
    • https://cdn.shopify.com/s/files/1/0439/0102/6459/files/31988628908.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_off00003e52.bin
d1f468e03afb8bb637f5b42e16b4e352800e2eca249bb5619a0be8cac1dc6c50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3E52 5660 bytes
font_01_sfnt_off00005171.bin
baf35a6c06605e7eb6c58bf5c32038d79047366e79dc56b5335ad2e7fe0d9763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5171 9544 bytes

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