Malicious PDF — malware analysis report

Static analysis result for SHA-256 5051aa2b283b9f80…

MALICIOUS

PDF

46.4 KB Created: 2020-08-29 21:26:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd58b0eac323d9333c4e2d0f76ec2f29 SHA-1: 92dd077607f38e8abb7f2586e32264be8c8e1025 SHA-256: 5051aa2b283b9f80492680a388fa2537a2804d604d317e4f65b4f2a914cffb91
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that points to a redirector, likely intended to lead the user to malicious content. The ML classifier also 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.ru/wix?keyword=ejemplos+de+hipotesis+de+investigacion+pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/31222601861.pdf
    • https://cdn.shopify.com/s/files/1/0438/4686/0960/files/the_kingdom_of_kaliron_guide.pdf
    • https://cdn.shopify.com/s/files/1/0449/9727/9908/files/bepedo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2710/2876/files/cuadro_medico_asisa_granada.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/46814680145.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9009/files/dudekitu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3812/9823/files/fubixuliwosazunebi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1064/4377/files/ascending_and_descending_order_worksheets_for_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65431134640.pdf
    • https://cdn.shopify.com/s/files/1/0440/9645/4808/files/natodidarukobax.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/vajibev.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/90375200450.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/kizebosi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/25908029604.pdf
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/esl_definite_and_indefinite_articles_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/99609574542.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_off000065ad.bin
6dc172c3eeb7c0129b3f3eba3b346b2d21a29ab26caddf0ccebe553382be141c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65AD 5356 bytes
font_01_sfnt_off000077d6.bin
16739c665a266c1b76f26bc995e74293108cfa5456f586c5b531bc94873258d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D6 11360 bytes
font_02_sfnt_off00009c9d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C9D 4324 bytes

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