Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ca054bc43ed1d3…

MALICIOUS

PDF

34.8 KB Created: 2020-08-14 09:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b36abb87e74b2e87a23ff24897996ab3 SHA-1: ca322e4e1af8160b43fbb0363e4cc5471c8b83c4 SHA-256: f7ca054bc43ed1d35244cb4a61f81a2029b44808ec5ecfc5d0687bb4cdea5acd
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to trick users into clicking on malicious links. The ML classifier also strongly indicated maliciousness.

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.com/wb?keyword=sanitas%20sft%2077%20manuale%20italiano
    • http://gesukomis.considerthestandardbred.com/uploads/1/3/1/4/131482995/torubodep.pdf
    • http://jalow.sdstarresources.org/uploads/1/3/0/7/130776804/lelugax_gisex.pdf
    • http://files.hopegardencounseling.com/uploads/1/3/1/4/131482926/wikifomimuf.pdf
    • http://files.coachsteele.tech/uploads/1/3/1/0/131070336/surefuwubuket.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/credit_report_singapore_government.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/polikigogowofefize.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/38269916003.pdf
    • https://cdn.shopify.com/s/files/1/0438/7107/6520/files/lupozaguzek.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/sozawapepazijizojat.pdf
    • https://cdn.shopify.com/s/files/1/0430/6354/1913/files/3558627195.pdf
    • https://cdn.shopify.com/s/files/1/0438/7844/9307/files/74048985284.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8588/files/arctic_cat_atv_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/90666443246.pdf
    • https://cdn.shopify.com/s/files/1/0449/6785/4248/files/wajorigulinoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/3441/8075/files/federal_itemized_deductions_worksheet_2017.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_off00004a02.bin
90e47c9dc41784465b8339e871c7080b194c00907fccde046cf2db8120821c7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A02 5000 bytes
font_01_sfnt_off00005af6.bin
ff1ae096cd8c93169e9ffa1ad44722fecd0e413e8c0ea15660ede8cc6f3099df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF6 10980 bytes

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