Malicious PDF — malware analysis report

Static analysis result for SHA-256 be918616fbd1f45a…

MALICIOUS

PDF

41.4 KB Created: 2020-08-25 16:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3678e0cc589daf69faf0b816c67d394 SHA-1: ac62737c0eff10194a450331811cc5f6599107bb SHA-256: be918616fbd1f45a17f0cbd3d57ad9f6da6820c0757fd8820c0c7d6a40d79628
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'movies on laptop' and the malicious URL, suggesting a lure. The presence of a link farm further indicates a malicious intent to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.com/pify?keyword=best+website+to++movies+on+laptop
    • http://files.hamshaw888.com/uploads/1/3/1/4/131453555/406d76bd682ce48.pdf
    • http://files.thesugarqueen.net/uploads/1/3/0/7/130739974/gotajeratefibutu.pdf
    • http://bopak.aliciawillspettit.com/uploads/1/3/1/4/131409309/136387.pdf
    • https://cdn.shopify.com/s/files/1/0433/1261/1481/files/financial_accounting_and_reporting_book_by_millan.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/international_arbitration_law_and_practice.pdf
    • https://cdn.shopify.com/s/files/1/0429/0206/1215/files/biogas_benefits.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/kafama.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/amsco_apush_chapter_23.pdf
    • https://cdn.shopify.com/s/files/1/0439/1147/9464/files/51476302289.pdf
    • https://cdn.shopify.com/s/files/1/0439/0024/0024/files/newowapaba.pdf
    • https://cdn.shopify.com/s/files/1/0436/8557/6857/files/cae_revised_exam_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5755/files/torewujowiwevu.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_off00006485.bin
c382769718dd61a172625a5b8cfd76dfebd7810f7aa55ffcd7a1df7c5ff1404c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6485 5212 bytes
font_01_sfnt_off0000763f.bin
249f733757d53efc7f13972b00344b69f7e4cd1c948f4261d7d0fbf0a9995300
pdf-font-stream PDF embedded font (sfnt) at offset 0x763F 10224 bytes