Malicious PDF — malware analysis report

Static analysis result for SHA-256 f900c525b782be67…

MALICIOUS

PDF

42.3 KB Created: 2020-08-24 06:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dba5488764ec07b1d66f0de4f45d2b1 SHA-1: d9457e3c6e5f759300bff5ab858967c18e3961ca SHA-256: f900c525b782be675d22ab182c31a0daa59f98b9e228d72ca0361158665c3daf
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL and other URLs that appear to be part of a link farm designed to manipulate search engine results. The primary intent appears to be directing users to malicious infrastructure through these embedded links.

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/pify?keyword=apa+style+format+article+citation
    • http://jajoram.langleycarpetcleaner.com/uploads/1/3/1/6/131636725/suxatanasom.pdf
    • http://files.countrytimbergoods.com/uploads/1/3/1/8/131871786/tadifurewibaruwok.pdf
    • http://vutusa.summitmartialartsacademy.com/uploads/1/3/1/3/131379591/lufubomen.pdf
    • https://cdn.shopify.com/s/files/1/0463/0354/3458/files/gudob.pdf
    • https://cdn.shopify.com/s/files/1/0434/3329/6028/files/elabore_um_texto_expositivo_argumentativo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8348/0736/files/zemazoxuvigixowube.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/nupawopifilurofedogupof.pdf
    • https://cdn.shopify.com/s/files/1/0432/0516/5216/files/juxatoxiwusu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9529/2059/files/mass_moment_of_inertia_example_problems_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/3999/7595/files/84545250061.pdf
    • https://cdn.shopify.com/s/files/1/0429/1677/4054/files/xamuwugawatibosesi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2565/3160/files/the_plague_albert_camus_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/gikokanugegid.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/how_to_improve_analytical_skills.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c7f.bin
12506fa33945b4fe640e8ec7e5e1aa0278b1effcabde4f8a88d7960f834ae102		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7F 5040 bytes
font_01_sfnt_off00006d88.bin
28c61014f8f8e2b4c672359fd666b337705e4e7721dfb77d497dbc01c6a0458f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D88 9660 bytes
font_02_sfnt_off00008e8c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8C 4324 bytes

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