Malicious PDF — malware analysis report

Static analysis result for SHA-256 43a63202f660d567…

MALICIOUS

PDF

45.4 KB Created: 2020-08-06 20:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: affd633b58bcfb6e2a4c750b729fe7a6 SHA-1: 889278e3ece11927f1c9fb4d01f235dd96cffa40 SHA-256: 43a63202f660d56775d0326cdf9d9999e4e4392774b7456f1cfd3446af18a7ce
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URLs, particularly the one pointing to 'ttraff.ru', are indicative of a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the URLs found.

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.ru/pify?keyword=charles+baudelaire+les+fleurs+du+mal+pdf
    • http://zoxatax.maconmilestones.com/uploads/1/3/1/4/131438137/xuzarurusi.pdf
    • http://jurega.marine-intl.com/uploads/1/3/1/8/131871674/rowuvepu.pdf
    • http://wijan.sscfc-braintree.com/uploads/1/3/1/4/131437987/lisudivaloxaxug.pdf
    • http://files.splashnaturals.com/uploads/1/3/0/7/130740524/memigifefak_sijesapi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/paypal_buy_now_button.pdf
    • https://cdn.shopify.com/s/files/1/0431/6102/6719/files/mofapiza.pdf
    • https://cdn.shopify.com/s/files/1/0436/9835/6392/files/rosolerafutaxofidutuzuted.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/widizosatadusuzovasovodas.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/bobowuz.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/45059539769.pdf
    • https://cdn.shopify.com/s/files/1/0428/5274/5375/files/52543498704.pdf
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/cinderella_story_script.pdf
    • https://cdn.shopify.com/s/files/1/0436/9776/6553/files/pathophysiology_of_pulmonary_hypertension.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/nemapulekaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/4518/2888/files/gavewedupuferasad.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_off00006e83.bin
49db2a622b0265950d152c50a978e35aaa3f6df7f9d3dbdd5d3823fe7e7992ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E83 5324 bytes
font_01_sfnt_off00008067.bin
b914f1cd76a4e800e1cc66564c2d7a72ef487bae1ac8271f0f21251eb754b6cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8067 12036 bytes

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