Malicious PDF — malware analysis report

Static analysis result for SHA-256 0535396d03bcc68c…

MALICIOUS

PDF

53.0 KB Created: 2020-08-11 22:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c2a2335a09e4c671f71e0344e018907 SHA-1: f5fdbd5ac2271453e8bb67228fb936625417a791 SHA-256: 0535396d03bcc68c9163e5276ef50fefb8d650c193294bf387ffe1a79a27e984
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links, including one pointing to a known malicious redirector. The heuristic firings indicate it's a redirector and a link farm, suggesting a phishing or scam attempt to drive traffic to malicious sites. The document body itself contains obfuscated text and URLs, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=amleto+testo+integrale+pdf
    • http://files.blackdogfabrication.com/uploads/1/3/1/3/131383727/9228740.pdf
    • http://files.emmahannaford.com/uploads/1/3/2/8/132814427/negame.pdf
    • http://files.mhecblacon.com/uploads/1/3/1/4/131482975/dijiratesupoxu_zufazakukafufu_nuzepujiburex_nekaleneto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/math_project_for_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0437/2699/5621/files/9275523635.pdf
    • https://cdn.shopify.com/s/files/1/0432/1784/6427/files/55220937295.pdf
    • https://cdn.shopify.com/s/files/1/0433/5815/9006/files/java_quiz_program.pdf
    • https://cdn.shopify.com/s/files/1/0435/9372/8159/files/jerunobadigewogin.pdf
    • https://cdn.shopify.com/s/files/1/0434/9411/3446/files/34886921515.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/50712891646.pdf
    • https://cdn.shopify.com/s/files/1/0440/1653/3654/files/tusil.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/lemixegutamezunisaduk.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/98180905076.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7535/files/66199472278.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009016.bin
d4397449ed0f812562262215717727b777f0a57c44802e59caac29092a382639
pdf-font-stream PDF embedded font (sfnt) at offset 0x9016 5348 bytes
font_01_sfnt_off0000a22e.bin
86bd5a02d1be8b8b71b32249ef2033e54f673798ac105723190251a5f5b01b49
pdf-font-stream PDF embedded font (sfnt) at offset 0xA22E 11412 bytes