Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65dd7ce712740c5…

MALICIOUS

PDF

48.4 KB Created: 2020-07-30 12:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39d053723d5cd52b41ee3d060e3e29eb SHA-1: a3398880e847f9e6b419a9e63b99b5004cd3e3c2 SHA-256: e65dd7ce712740c57e20ab72fccf5b6a454100e010db4ebe46f919773b42d59a
152 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to downloading a PDF, suggesting a lure. The presence of many external links, including to Shopify, indicates a link farm designed to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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=anesthetic+pharmacology+basic+principles+and+clinical+practice+pdf+download
    • http://files.santabarbarabirthmatters.com/uploads/1/3/1/0/131070151/906310182465.pdf
    • http://files.ndwc.org/uploads/1/3/0/7/130740065/1893152.pdf
    • http://files.jenasawyer.com/uploads/1/3/1/4/131483343/bipivalovi.pdf
    • http://files.mastersveterinaryservice.com/uploads/1/3/1/8/131871535/a7e6a2b8cfdb.pdf
    • http://files.mastersveterinaryservice.com/uploads/1/3/1/8/
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/simolatolopuwibokasonawo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/faxetapibifetixoju.pdf
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/86837766844.pdf
    • https://cdn.shopify.com/s/files/1/0433/1601/9355/files/54230062098.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/zisimomimub.pdf
    • https://cdn.shopify.com/s/files/1/0431/7875/4199/files/86805874019.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/zagapigazunetofi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedagefegumam.pdf
    • https://cdn.shopify.com/s/files/1/0437/7165/8389/files/10369719079.pdf
    • https://cdn.shopify.com/s/files/1/0438/0000/2717/files/vamixilopenufulow.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/xirebav.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000691c.bin
b9c66a00447c198080bb08a39b3f9be9b75408dadc7284e6e7f265e2275cecf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x691C 5680 bytes
font_01_sfnt_off00007c44.bin
9278f2a5dbc49b465578d05d8daefdb4d5dd941e3399cb346d6e4aaf1f024aad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C44 9848 bytes
font_02_sfnt_off00009e1a.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E1A 16204 bytes

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