Malicious PDF — malware analysis report

Static analysis result for SHA-256 7590eadd03f21620…

MALICIOUS

PDF

77.5 KB Created: 2020-08-23 14:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e712f2a4f22eb3d32aba15088b7e9cf SHA-1: 78b4ec45456c924aa1520423832e17ba7de597bc SHA-256: 7590eadd03f21620783a4a79ec033ba99ad126e773d1f8d8915d88b61d7a50b8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the same malicious redirector. This suggests the primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution.

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/pify?keyword=medscape+clinical+practice+guidelines
    • http://files.981themarcoislandfm.com/uploads/1/3/0/8/130813887/bfb4a736.pdf
    • http://viwizali.kellykadera.com/uploads/1/3/2/8/132814930/gixeka.pdf
    • http://files.alaskadermatology.com/uploads/1/3/1/4/131406592/56645385.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7785/1550/files/everything_stays_ukulele_chord_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/zaniro.pdf
    • https://cdn.shopify.com/s/files/1/0435/7668/8798/files/t._i._paper_trail.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/63874978238.pdf
    • https://cdn.shopify.com/s/files/1/0437/8184/9245/files/sefivawuxipokakajibalu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4576/3744/files/rotol.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/husqvarna_55_chainsaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/wivewisugedepurezuzelezov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9485/2252/files/fishbone_diagram_blank_template_excel.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1558/files/26723682369.pdf
    • https://cdn.shopify.com/s/files/1/0431/0650/0769/files/pdf_file_reader_download_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/84268834034.pdf
    • https://cdn.shopify.com/s/files/1/0432/5005/7373/files/simple_definition_of_technology.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e4.bin
12be050e2194640e5de212128a4000ae0027321fabc23ad25018fbc88ecbb9a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E4 5248 bytes
font_01_sfnt_off0000fbcb.bin
38056f68b60e9e91aa53afaf42ca182ffdd24a4564bf4de04edebac331fd97c1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCB 14240 bytes