Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63c99f6c5bb7c13…

MALICIOUS

PDF

80.8 KB Created: 2020-09-11 09:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40e7a7205670023dd769b4d21f87d30b SHA-1: cf1139db39ff2a465282939cf4a247325c2d9dbe SHA-256: b63c99f6c5bb7c13cf85dbbcbe53857ca288b4eecfdd42019debc99f001f5811
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of numerous external links. One critical heuristic firing indicates a link to a known malicious redirector, specifically 'https://ttraff.link/wix?keyword=acls+guidelines+epinephrine'. Another critical heuristic identified a large number of external PDF links, with the first being 'https://cdn.shopify.com/s/files/1/0437/0900/5978/files/88927203710.pdf'. This suggests a link farm or redirection strategy to distribute malicious content or conduct phishing.

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.link/wix?keyword=acls+guidelines+epinephrine
    • https://cdn.shopify.com/s/files/1/0437/0900/5978/files/88927203710.pdf
    • https://cdn.shopify.com/s/files/1/0456/4477/5591/files/gokasuxorikebali.pdf
    • https://cdn.shopify.com/s/files/1/0436/1358/5566/files/project_manager_interview_questions_and_answers_videos.pdf
    • https://cdn.shopify.com/s/files/1/0432/3367/3380/files/51396164258.pdf
    • https://cdn.shopify.com/s/files/1/0436/6955/3305/files/international_510_grain_drill.pdf
    • https://cdn.shopify.com/s/files/1/0436/2004/0866/files/rockler_jig_it_drill_guide_australia.pdf
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/ich_guidelines_for_analytical_method_development_and_validation.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/luwiviwufusuji.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/america_the_story_of_us_cities_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/8525/0216/files/vegironi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3957/9546/files/a_monster_calls_play_script.pdf
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/62514381681.pdf
    • https://cdn.shopify.com/s/files/1/0437/7496/7965/files/cognos_reporting_tool_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0433/0310/8768/files/revajesagif.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/competency_based_interview_answers_adaptability.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/lease_agreement_template_for_land.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/sonakigijifigujinokuxik.pdf
    • https://cdn.shopify.com/s/files/1/0439/0515/5240/files/padajusipusiwep.pdf
    • https://cdn.shopify.com/s/files/1/0434/3968/5799/files/5091142489.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_off00010050.bin
4a28b0c0a8fa6060586ecc7f684d513ebebd439a009cb6a08a22f832759d7489
pdf-font-stream PDF embedded font (sfnt) at offset 0x10050 5116 bytes
font_01_sfnt_off000111b2.bin
adde0d747bcc7bfcb61ba6f5849b5a83b51d02b147db18e1a10ed95d421c6b81
pdf-font-stream PDF embedded font (sfnt) at offset 0x111B2 10968 bytes