Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58cb907232fcf6b…

MALICIOUS

PDF

43.1 KB Created: 2020-08-03 06:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e147f3319adb5f3e70938e9423044223 SHA-1: 9bf6d81a19efd42fa609994b5ad9db8bd135d30b SHA-256: e58cb907232fcf6b9e6306952e365086c06bc3fc544f1683f55d873bd2b39893
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for a popular engineering textbook. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the primary URL leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on cdn.shopify.com, suggesting an attempt to game search engines or distribute content widely. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this document.

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=engineering+mechanics+dynamics+meriam+8th+edition+pdf
    • http://files.thelittlebookshop.info/uploads/1/3/0/7/130738996/7562351.pdf
    • http://files.thacva.org/uploads/1/3/0/7/130739202/5cf5b7f571.pdf
    • http://files.nursegonestrong.com/uploads/1/3/1/8/131856769/zofofegubavuba.pdf
    • https://cdn.shopify.com/s/files/1/0432/0916/2907/files/redozatekidakul.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/morrowind_release_date.pdf
    • https://cdn.shopify.com/s/files/1/0449/8885/8536/files/avd_manager_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4121/files/xudus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rexalomofovuwazeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/14885447070.pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/55585406617.pdf
    • https://cdn.shopify.com/s/files/1/0437/4115/1386/files/vuxaxuvuruvoru.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5613/files/17821450902.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/vuferegi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/46379677381.pdf
    • https://cdn.shopify.com/s/files/1/0433/3201/0152/files/59768029173.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_off00005ae6.bin
b0cdfe289366f0ea58216f2616d31234354c1117b2c900b9249b37b30b6f6edc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE6 5580 bytes
font_01_sfnt_off00006daf.bin
ff4aaa191be6d823e9ae4bb328fd2077c42483c6121038251d700d6479d1d067		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAF 10320 bytes
font_02_sfnt_off000090e4.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90E4 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.