Malicious PDF — malware analysis report

Static analysis result for SHA-256 297f0e80463234ab…

MALICIOUS

PDF

41.1 KB Created: 2020-08-11 02:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d8461e1cb0f300f7477509e2d5d303b SHA-1: 93cb9d4e63ffd6557e406288ebe6ef45a6fee82a SHA-256: 297f0e80463234ab48656495209f4f1c65dad93fd3cf23a977017fa9e6c742f9
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs that are likely part of a link farm designed to distribute malicious content or lead to phishing pages.

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/pify?keyword=calendar+july+august+2020+pdf
    • http://files.synergyincreation.com/uploads/1/3/1/4/131406676/5026420.pdf
    • http://gidisik.ytcg.org/uploads/1/3/1/4/131437601/5abf874c9c2.pdf
    • http://saxowawuj.yasminerose.com/uploads/1/3/0/9/130969465/7bfaab301399e.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/guzowuwaperesu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/icy_veins_rogue_leveling.pdf
    • https://cdn.shopify.com/s/files/1/0433/7840/9639/files/vukeniboviriparojitenir.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2560/files/rigufusid.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/laboratory_manual_for_general_biology_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/3575/4650/files/piwadumatunox.pdf
    • https://cdn.shopify.com/s/files/1/0432/2846/3271/files/10526213258.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/auditing_and_assurance_services_16th_global_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/9531/6896/files/budget_and_budgetary_control_project.pdf
    • https://cdn.shopify.com/s/files/1/0432/8652/8155/files/sql_developer_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0448/1007/6322/files/chain_letter_christopher_pike.pdf
    • https://cdn.shopify.com/s/files/1/0433/6487/6444/files/68200681975.pdf
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/sqlite_cheat_sheet.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_off0000615c.bin
8b825a12bd85580b96ee0e5cb7d0131f390bfe293b8c6a43f909e2ce301b4d0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x615C 5564 bytes
font_01_sfnt_off00007469.bin
19987752014ed22d6db6a38615971987f0d8091e37dbe9f5691e5f5135497623
pdf-font-stream PDF embedded font (sfnt) at offset 0x7469 10216 bytes