Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5dfc3a90e2fd190…

MALICIOUS

PDF

36.4 KB Created: 2020-08-11 07:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bd70efa9a717254ce129d320e11e984 SHA-1: 556e268631cc8415fadaf111d283e5f2c661bd39 SHA-256: e5dfc3a90e2fd1902494ec3cb7452c6d053ffc2086662d6aa64eac34b11e9a49
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=isp+network+diagram+pdf'. Another critical heuristic indicates a PDF link farm, suggesting an attempt to game search engines or distribute content. The ML classifier strongly flagged this PDF as malicious. The presence of numerous external links, including one pointing to a malicious redirector, indicates a likely phishing or malware distribution attempt.

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=isp+network+diagram+pdf
    • http://xuzixof.pennfieldplace.org/uploads/1/3/1/8/131871390/ladumuromavivol_larameradewat.pdf
    • http://daviwin.lewisgreatdanes.com/uploads/1/3/1/3/131383314/nojam.pdf
    • http://files.sassafrassugaringstudio.com/uploads/1/3/1/8/131856907/9909356.pdf
    • https://cdn.shopify.com/s/files/1/0438/3889/8333/files/pizefalorun.pdf
    • https://cdn.shopify.com/s/files/1/0436/5221/9030/files/78069765241.pdf
    • https://cdn.shopify.com/s/files/1/0428/4507/7671/files/arihant_computer_awareness_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5898/6150/files/46038200059.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/83153755259.pdf
    • https://cdn.shopify.com/s/files/1/0436/5379/1909/files/3733184411.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/bifubik.pdf
    • https://cdn.shopify.com/s/files/1/0432/4874/6651/files/91054177542.pdf
    • https://cdn.shopify.com/s/files/1/0430/8828/1761/files/dugamusabakoberemisevin.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/6921781182.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/37381253302.pdf
    • https://cdn.shopify.com/s/files/1/0432/2761/1295/files/jigarosepepiwerekabagaguw.pdf
    • https://cdn.shopify.com/s/files/1/0437/7490/2430/files/28383700736.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_off00004fb5.bin
d52a5f0b2f9b58e56b5da8128eb869637e6e680c58879f0353af640e06879d4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB5 5424 bytes
font_01_sfnt_off00006227.bin
d0680e932b058c5b348f02ebffbc363a65ec29f8181a54091c140e4d37059528		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6227 10240 bytes

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