Malicious PDF — malware analysis report

Static analysis result for SHA-256 57705b48d74b2ac8…

MALICIOUS

PDF

42.2 KB Created: 2020-08-24 20:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb0d95d704e9d486af0e940847840a89 SHA-1: 3545ef2f8d0b0d7d7e0852f103b19de25f881f82 SHA-256: 57705b48d74b2ac8651741e9749183348a77400a0a83f31659878a5f22964217
162 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to numerous PDFs hosted on Shopify, likely for SEO poisoning or to obscure the malicious redirector. The primary malicious link, 'https://ttraff.com/pify?keyword=knox+manage+guide', is a known redirector. The document also contains instructions to disable security software, a common tactic to facilitate further malicious activity. No scripts were extracted from this sample.

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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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=knox+manage+guide
    • http://files.ourgreenlittlevillage.com/uploads/1/3/0/7/130739986/lusib_makijiwefopu_saxotijuvedum_gubul.pdf
    • http://files.placerconservation.com/uploads/1/3/0/8/130814430/a6bb32d22.pdf
    • https://cdn.shopify.com/s/files/1/0433/7546/0515/files/47501921183.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/44095665990.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1687/files/finance_assistant_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/5025/3992/files/70119636727.pdf
    • https://cdn.shopify.com/s/files/1/0432/2980/6759/files/sotulifabibewugil.pdf
    • https://cdn.shopify.com/s/files/1/0432/0450/9853/files/sifusanavuketepo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6077/9413/files/fisiopatologia_del_cancer_de_utero.pdf
    • https://cdn.shopify.com/s/files/1/0435/6797/2515/files/ejercicios_de_movimiento_rectilineo_uniforme_retardado_resueltos.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/tokabowela.pdf
    • https://cdn.shopify.com/s/files/1/0449/5081/4888/files/yoga_exercises_to_increase_height.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3979/files/a_d_code_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/a_level_mathematics_statistics_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1085/files/bravely_second_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.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_off0000685a.bin
a50bba452d874e4482788995634a61984132eb8d9048f02d1d7ed93f5b63eac1
pdf-font-stream PDF embedded font (sfnt) at offset 0x685A 4876 bytes
font_01_sfnt_off000078de.bin
a2e74d715c5246b63441f9258ed6e1bff656543372b6ee0bf4fbf7ac9ed85170
pdf-font-stream PDF embedded font (sfnt) at offset 0x78DE 10404 bytes