Malicious PDF — malware analysis report

Static analysis result for SHA-256 4448fd3fb4aec31c…

MALICIOUS

PDF

42.4 KB Created: 2020-08-19 06:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d94dc746f94f9b058ee7822b0b5ff15f SHA-1: 9aad512800f17b9b604230ae749d935ab08e021e SHA-256: 4448fd3fb4aec31c8b3b6b06f83905e60789e1c1bea2505e93b4d9c8d0ce2ad2
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=chocobodi+a+star', which is flagged as malicious. This suggests the PDF is designed as a link farm to distribute malware or phish users, leveraging the 'chocobodi a star' keyword.

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=chocobodi+a+star
    • http://mefozolo.bbchange.org/uploads/1/3/0/7/130775164/forofabu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1619/2153/files/9347368404.pdf
    • https://cdn.shopify.com/s/files/1/0433/0124/0992/files/kukozod.pdf
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/dupesotopurofukomadiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/25734479566.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/office_365_a1_plus_for_students.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/65184060731.pdf
    • https://cdn.shopify.com/s/files/1/0434/4555/1271/files/sasezuwivedelon.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0422/files/market_research_analysis_report.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_off00004ef8.bin
6d23b471447e966838791c11d7be98356cecf07d160787885db8eb38bb388ab8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF8 4720 bytes
font_01_sfnt_off00005f05.bin
2e83f0f89638f8d7ba22e9be3ccf6f78275ab6165e2305959e655bfbb21e05ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F05 15392 bytes
font_02_sfnt_off00008dd7.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD7 4324 bytes

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