Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f1b068476b40eb…

MALICIOUS

PDF

39.6 KB Created: 2020-09-01 17:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc1a7f8c867d933052cb6b1a32f59f94 SHA-1: a802209d533b945cf84baf42fc3cef9e4cd68de3 SHA-256: 34f1b068476b40eb94f6da82f1d16e83bf020bcd6af4942c5bc880f2f599b68b
152 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, ttraff.cc, which is disguised as a 'black desert mobile knowledge guide'. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary malicious activity appears to be directing users to malicious infrastructure via embedded links.

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.cc/wix?keyword=black+desert+mobile+knowledge+guide
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/kaboludolaxopaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96626323422.pdf
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/4667124585.pdf
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/catholic_cursive_handwriting_worksheets_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8342/files/45780862821.pdf
    • https://cdn.shopify.com/s/files/1/0432/0631/2098/files/takapojofodukerigofevi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kufotiniponekurek.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/challani_o_chirugali_ayyappa_naa_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/97463988432.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/the_complete_penny_stock_course_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/business_studies_grade_11_exam_papers_and_memos_2020.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_off00005c78.bin
009f298d9e78d3efc43c6163e9e75aa0078284d0916bc5f502f0bb65d87f6494
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C78 5604 bytes
font_01_sfnt_off00006f81.bin
29c6cd84008ef2d9992fd48f9e489e7757a62f1757f9c6d8218aab3aa551fdad
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F81 10096 bytes