Malicious PDF — malware analysis report

Static analysis result for SHA-256 a700af93129a92eb…

MALICIOUS

PDF

43.2 KB Created: 2020-08-24 15:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c06f7ddeb2c21514c15d92c9f5dd8bd6 SHA-1: d15b945101ee7caa78c0142115e563f8df8cf298 SHA-256: a700af93129a92ebac9988b871a0a16cd9acbde4c35b02d609dc618fa4ba8e1a
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, pointing to `https://ttraff.cc/pify?keyword=free+reading+worksheet+for+6th+grade`. This URL is presented within the document body as a lure for a 'free reading worksheet'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains hosting other PDFs. The primary malicious URL redirects to further infrastructure, indicating a likely phishing or malware distribution attempt.

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.cc/pify?keyword=free+reading+worksheet+for+6th+grade
    • http://files.nicolagiuliato.com/uploads/1/3/0/9/130969573/vomixuvuniv.pdf
    • https://cdn.shopify.com/s/files/1/0435/3887/4532/files/zapig.pdf
    • https://cdn.shopify.com/s/files/1/0439/3720/2344/files/ayumilove_evan_skill_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/1_night_in_chyna.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/sheep_brain_dissection_lab_report_results.pdf
    • https://cdn.shopify.com/s/files/1/0430/4424/1562/files/biosynthesis_of_fatty_acids_in_plants.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/amparo_directo_ejemplo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4397/7366/files/butusizagekaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/3941/6732/files/90067898966.pdf
    • https://cdn.shopify.com/s/files/1/0437/7044/5975/files/musobaxeweravitu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/winezasijidapizu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/besoin_en_fond_de_roulement_normatif_exercice_corrig.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_off00006a3a.bin
50f011fa9daf06b09238043598e9bfc4b0e91ca80626c131fd6ad7dd8d67c0d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3A 5404 bytes
font_01_sfnt_off00007cb0.bin
6f60900bf963d1047d5ea11fa5fe61b5606b2542007d27184386a713deb1a08d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB0 10456 bytes

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