Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1b46b8c3b6da66…

MALICIOUS

PDF

43.5 KB Created: 2020-08-28 09:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f429e55dc06ea50dd19a6c07e9dc0356 SHA-1: 932d662bc3bbff25671f7cc98ad0e65c1985712f SHA-256: 4d1b46b8c3b6da66160c90f4fd228f1f4d2a359f4c8ea2d94dc68e0fbc3483d6
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to malicious infrastructure. The document body, though heavily obfuscated, contains text related to a 'Hebrew bible translated into english pdf' and includes the malicious redirector URL, suggesting a lure to download potentially harmful content. The ML classifier also strongly indicated maliciousness.

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.link/pify?keyword=hebrew+bible+translated+into+english+pdf
    • http://files.hismaidservant.com/uploads/1/3/2/3/132303351/24c4c9.pdf
    • http://files.grandhotelslux.com/uploads/1/3/1/4/131437093/fikukirebij.pdf
    • http://vasonexu.jessethomascomics.com/uploads/1/3/2/6/132695839/dokaj.pdf
    • http://vekin.joshuamilton.net/uploads/1/3/1/6/131606347/92437a2e6e22e7.pdf
    • https://cdn.shopify.com/s/files/1/0434/3863/7208/files/neil_rackham_spin_selling.pdf
    • https://cdn.shopify.com/s/files/1/0450/4892/2270/files/half_centimeter_grid_paper.pdf
    • https://cdn.shopify.com/s/files/1/0435/4365/8650/files/35418843005.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9009/files/st3_form_mn.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/44308071955.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/21945892893.pdf
    • https://cdn.shopify.com/s/files/1/0429/8955/1770/files/enhancement_shaman_7._2._5.pdf
    • https://cdn.shopify.com/s/files/1/0462/0363/3817/files/lonatamuzifebin.pdf
    • https://cdn.shopify.com/s/files/1/0432/3832/6432/files/map_testing_scores_chart_2012.pdf
    • https://cdn.shopify.com/s/files/1/0439/2812/5595/files/uf_housing_portal.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/apocalypse_culture_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/41454643777.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/61200884021.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.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_off00006c04.bin
85ae64d963cff99054697cbcb91a9a6b08441d1628fdce9b7441a32cabd34d78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C04 5496 bytes
font_01_sfnt_off00007eb2.bin
4096459c1767a77e551fb5a39a54118631b0e53cd5d3a1b3897ab3d992655cd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB2 9976 bytes

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