Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5cc9ebfdfeb269…

MALICIOUS

PDF

45.9 KB Created: 2020-08-11 13:40:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc94944bf929e43340ccb872bebcc6f6 SHA-1: c5c9ce1642a091f0171c80f7de58190dd8efb1a6 SHA-256: be5cc9ebfdfeb269a6ad178ddf8c31a76920ae83b9cace7d897c12554dd31ce4
152 Risk Score

Malware Insights

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

The PDF contains a prominent link with the text "Arduino uno board details pdf" that redirects to the malicious URL https://ttraff.com/pify. This URL is flagged as a known malicious redirector. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO-based link farms used to distribute malicious content. The ML classifier strongly indicates maliciousness.

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=arduino+uno+board+details+pdf
    • http://zubesono.deepcreektrading.com/uploads/1/3/1/4/131453555/6763662.pdf
    • http://kakak.parahills4.com/uploads/1/3/1/4/131408738/3388005.pdf
    • http://files.pcbaseballacademy.com/uploads/1/3/1/3/131398204/fesigigifavorifafo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/68719325502.pdf
    • https://cdn.shopify.com/s/files/1/0433/4800/0922/files/rogasewi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4435/5739/files/mathematical_induction_solved_problems.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4071/files/dirobisewusinexofeserovaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/2499/6758/files/10423078499.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4134/files/modulus_equations_and_inequalities.pdf
    • https://cdn.shopify.com/s/files/1/0437/1388/8405/files/angular_4_convert_html_to.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/daisy_1894_bb_gun_parts_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/novurufasavezol.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/22387065374.pdf
    • https://cdn.shopify.com/s/files/1/0430/6544/2457/files/visuzazub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gadawatozuwagujezudoru.pdf
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/ranijuparedivavulelujetov.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/katibujulegilu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9055/8620/files/godilimepakimewex.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/
    • https://cdn.shopify.com/s/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007661.bin
ff40786b3eeccb9cc6954ae681443e454a87afef0e7f6459d1eed46a3ade21fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7661 5164 bytes
font_01_sfnt_off000087f6.bin
e9707ae47dd95575c1c355638147635c43b47151ecd4fcb4d49f301c033492e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87F6 10068 bytes

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