Malicious PDF — malware analysis report

Static analysis result for SHA-256 b706ee21067801ed…

MALICIOUS

PDF

39.6 KB Created: 2020-08-10 07:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b33b7148034afb46b66e43b8fe48639e SHA-1: d4a21c00566afa4ec79bbfc0ed9a75847f38710c SHA-256: b706ee21067801eddc4df12499636cf8064b18819ee28ffafa94c02b22c7606b
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link leads to a URL that appears to be part of a link farm designed to host numerous PDFs, likely for SEO poisoning or to obscure malicious activity. The ML classifier also strongly indicated maliciousness. The primary attack vector is likely a phishing lure, directing users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=present+simple+and+present+continuous+exercises+upper+intermediate+pdf
    • http://wipejal.predictiv.co.uk/uploads/1/3/2/6/132681352/sakonojozifotaduv.pdf
    • http://files.ccfreelancejournalist.co.uk/uploads/1/3/1/4/131407668/477688.pdf
    • http://files.belfordcashmere.com/uploads/1/3/1/4/131437627/1322140.pdf
    • http://pamat.charankainth.com/uploads/1/3/0/8/130814328/a81156d5220.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/dominating_sword_immortal_novela_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/rekud.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/35542703219.pdf
    • https://cdn.shopify.com/s/files/1/0455/4902/7493/files/venefukanoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4647/7725/files/magnavox_universal_remote_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0438/8978/7048/files/xapal.pdf
    • https://cdn.shopify.com/s/files/1/0446/5029/9555/files/orlando_furioso_di_ludovico_ariosto_raccontato_da_italo_calvino.pdf
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/trends_in_higher_education.pdf
    • https://cdn.shopify.com/s/files/1/0436/3016/6176/files/adding_and_subtracting_mixed_numbers_with_like_denominators_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/11867331118.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6909/files/discord_invisible_text.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fatexuxutul.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/git_reset_to_remote.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/90357205146.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_off00005002.bin
56b921bb659a6f90d6e7813196e7e7eaca0d411fe9cea326efdcb7b17608da7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5002 5252 bytes
font_01_sfnt_off000061b5.bin
27c36dead08ead0b44165f73e238509484112b28ddc92a278ba6991ac99b358c
pdf-font-stream PDF embedded font (sfnt) at offset 0x61B5 9548 bytes
font_02_sfnt_off0000825b.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x825B 4324 bytes