Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba97ee5ffdf8f668…

MALICIOUS

PDF

42.4 KB Created: 2020-08-22 00:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6756d8764b91b252e6763cc27b7ab7f SHA-1: d94e428edb2c23e7bceaca1b6fc14d0490ecd2dc SHA-256: ba97ee5ffdf8f6686f5ccd0f9ff914087b540c9731f0a00f1b825de7b990fbb2
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 identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Medical laboratory technologist pdf' and includes the malicious URL. This suggests a phishing or scam attempt to redirect users to malicious content. The presence of many external links, including benign ones hosted on Shopify, indicates a link farm strategy to improve search engine ranking for malicious content.

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.com/pify?keyword=medical+laboratory+technologist+pdf
    • http://xabob.antoniacundy.com/uploads/1/3/2/6/132695219/zemimonofeba.pdf
    • http://dexidet.aurum-et-argentum.net/uploads/1/3/0/8/130874601/zesipeturomema_namojumifelix_dowileworen.pdf
    • https://cdn.shopify.com/s/files/1/0434/1553/5774/files/angular_formgroup_set_value.pdf
    • https://cdn.shopify.com/s/files/1/0438/3748/9309/files/attendance_sheet_excel_macro.pdf
    • https://cdn.shopify.com/s/files/1/0440/5238/1846/files/ziwupufalixebekafo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4254/4533/files/29178165480.pdf
    • https://cdn.shopify.com/s/files/1/0437/5235/8049/files/brew_install_android_studio.pdf
    • https://cdn.shopify.com/s/files/1/0437/0546/7035/files/cambridge_mathematics_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/gigin.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/40242926331.pdf
    • https://cdn.shopify.com/s/files/1/0436/1958/2110/files/jegejaketavabalonof.pdf
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/39157747327.pdf
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/61448558948.pdf
    • https://cdn.shopify.com/s/files/1/0430/9493/3665/files/wefozinukunudipar.pdf
    • https://cdn.shopify.com/s/files/1/0441/0540/0472/files/bcia_8016_form_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0430/0547/7023/files/six_sigma_green_belt.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/disakulaxuroxev.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006453.bin
117636f0a9f8c35be37cf43b7bf8ea43d0e7f4617733603604643ae45e841a8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6453 5664 bytes
font_01_sfnt_off00007796.bin
1d5a005482a7ed0174db50cadb0a95710e001a112b6e1c9e96c55feff867f604		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7796 10860 bytes

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