Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39df6c0413e435d…

MALICIOUS

PDF

50.1 KB Created: 2020-08-22 09:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f82b9d78f00dd4543784a69fb83f8f84 SHA-1: e3511f8549188ecbe04069bc3ab60946365957e1 SHA-256: b39df6c0413e435dbbaccecb363e8e6744c460a074aca5bcbcd67cecf95ed371
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=scientific+poster+presentation+guidelines', which is flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious infrastructure, potentially for further exploitation or phishing. The presence of a QR code lure also indicates a social engineering attempt.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=scientific+poster+presentation+guidelines
    • http://sasit.morganaclark.org/uploads/1/3/0/8/130873995/mowarafolev.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/13263253222.pdf
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/radio_golf.pdf
    • https://cdn.shopify.com/s/files/1/0433/4298/7423/files/absorption_versus_variable_costing.pdf
    • https://cdn.shopify.com/s/files/1/0434/8893/6102/files/effects_of_globalization_in_tanzania.pdf
    • https://cdn.shopify.com/s/files/1/0429/4282/4611/files/17167153780.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.pdf
    • https://cdn.shopify.com/s/files/1/0435/2986/3320/files/abdominal_ultrasound_in_dogs.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/segavedifure.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/javuvanazupox.pdf
    • https://cdn.shopify.com/s/files/1/0437/6831/6055/files/angular_formarrayname_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/58052221559.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1862/files/ashtabula_county_clerk_of_courts_forms.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_off00008433.bin
9c9c5c3794629903a1e520474fa3dc1514f03373609d3151d74cea648bf46241		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8433 5424 bytes
font_01_sfnt_off000096a4.bin
db34640eb63439eeaa4297f7ec38c588ec855189107d4e88c62df16e64c163ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96A4 10784 bytes

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