Malicious PDF — malware analysis report

Static analysis result for SHA-256 4460519fbb17589d…

MALICIOUS

PDF

42.5 KB Created: 2020-08-11 08:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2346177288eba08664d2cda93b1028d5 SHA-1: de3590349f08d226cc16603cb27ed31f69f693b0 SHA-256: 4460519fbb17589da945287071228b7edeb24ba789d39c6cf962ec2feba43768
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a document translation tool. The ML classifier strongly indicates maliciousness. The primary malicious URL, 'https://ttraff.cc/pify?keyword=traducir+documento+ingles+a+espa%25C3%25B1ol+pdf', is designed to redirect users to further malicious content. The document body, though heavily obfuscated, contains this URL and other benign-looking Shopify links, likely part of a link farm to improve SEO 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.cc/pify?keyword=traducir+documento+ingles+a+espa%25C3%25B1ol+pdf
    • http://files.wscs.org/uploads/1/3/0/7/130776757/3735549.pdf
    • http://gifute.midlandsurgicalinstruments.com/uploads/1/3/2/7/132740805/pofap_dagasar.pdf
    • http://files.shadowcaststudios.com/uploads/1/3/1/4/131453484/pasixu_rajepekodug.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/sakeregubagerajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1057/9865/files/mevonitabatinigaki.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/pdf_to_word_doc_converter_mac.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5413/files/because_of_winn_dixie_journeys.pdf
    • https://cdn.shopify.com/s/files/1/0434/5816/6949/files/assembly_language_step_by_step_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/dark_knight_skill_build.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5013/files/84575358571.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/66822871395.pdf
    • https://cdn.shopify.com/s/files/1/0437/1880/3605/files/20117250439.pdf
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/24735873204.pdf
    • https://cdn.shopify.com/s/files/1/0432/4016/1435/files/3035381440.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_off000054a2.bin
3f008176fd09898b574aeb3e339c51dd8d3d920fed56308fe2306a997b00ca53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54A2 5520 bytes
font_01_sfnt_off00006705.bin
aa9e027c791e7e0a6c53e488b41aafb23bc8fdd03a2355c28a3560d75542b945		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6705 12252 bytes
font_02_sfnt_off00008cdc.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDC 4324 bytes

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