Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d17a771978241bb…

MALICIOUS

PDF

123.5 KB Created: 2020-08-02 06:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1f19198b92bc1d1e557f47f2860b26a SHA-1: 5b1d18de33f137b205832a03543d0409e8052153 SHA-256: 5d17a771978241bb3ebed7474bf6f59f0c269b0f6f0821c99d80b433f2edc796
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm designed to host malicious content. One prominent link, 'https://ttraff.cc/pify?keyword=aleister+crowley+pdf', is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, indicating a sophisticated attempt to distribute harmful content.

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=aleister+crowley+pdf
    • http://files.lovelovemedodesigns.com/uploads/1/3/2/6/132696621/9476880.pdf
    • http://files.eriksbracelets.com/uploads/1/3/0/7/130739204/zogofem.pdf
    • http://files.bandofcovers.net/uploads/1/3/1/1/131164574/7019428.pdf
    • http://files.dannysrods.com/uploads/1/3/1/0/131069875/zuwofaridazitujev.pdf
    • http://files.innovativemindfulsolutions.com/uploads/1/3/2/8/132815767/sasomozabelow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0323/1908/files/zujifetur.pdf
    • https://cdn.shopify.com/s/files/1/0429/1821/5846/files/68147211642.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/xetabemegesukuxus.pdf
    • https://cdn.shopify.com/s/files/1/0438/8965/5960/files/56525655873.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/ingame_wiki_mod.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6234/files/lijaperanunefurefunujaba.pdf
    • https://cdn.shopify.com/s/files/1/0430/9457/3205/files/agency_coupled_with_an_interest.pdf
    • https://cdn.shopify.com/s/files/1/0434/9450/6661/files/24891020745.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/70917011477.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/vexibugob.pdf
    • https://cdn.shopify.com/s/files/1/0433/9879/1329/files/ruxugexudidemonizugaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0627/9323/files/matusasipafa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/20690683531.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001939f.bin
53b0ba3c1389353d6cbf4e03cf7ac140ff2550fcc75e0f750c3a1a6ff2ffe860		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1939F 5120 bytes
font_01_sfnt_off0001a538.bin
162606d8ebbb852fd756aae2498b9a1cf82c73f73949c763e4e22d9eefc75608		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A538 11184 bytes
font_02_sfnt_off0001cb90.bin
ccd0ea095085b9379100d4de0d13d045157d8501f46cd3db2ef5c00475687e02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB90 16088 bytes

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