Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34de97c9a2a75c2…

MALICIOUS

PDF

39.8 KB Created: 2020-08-19 20:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 211a3e6136c93147bc4eafb2e5c72217 SHA-1: 613a2eab7b726f14832aa86a1250bf11770fbb78 SHA-256: e34de97c9a2a75c25193134f192e550c0f44e597760ca59ab3d73f8d65f16f50
154 Risk Score

Malware Insights

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

The PDF contains a prominent link that, when clicked, redirects to a malicious URL. The document body text, though heavily obfuscated, contains the string 'Kms activator for microsoft office 2007' and the malicious URL, indicating a social engineering lure. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the link leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a larger link farm, likely for SEO manipulation or distributing malicious content.

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.ru/pify?keyword=kms+activator+for+microsoft+office+2007
    • http://kiruro.thehealthideserve.com/uploads/1/3/1/4/131438177/7696917.pdf
    • http://zukoso.bakerandhurst.com/uploads/1/3/2/6/132682076/tavezemuzukiziziwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3319/8745/files/10678632318.pdf
    • https://cdn.shopify.com/s/files/1/0430/7861/5189/files/mijavokaruwomigi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2771/6520/files/comment_apposer_signature_document.pdf
    • https://cdn.shopify.com/s/files/1/0433/4904/9494/files/mba_thesis_on_supply_chain_management.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/ackerman_steering_gear_mechanism.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3641/files/blouse_neck_design_images.pdf
    • https://cdn.shopify.com/s/files/1/0438/4659/8816/files/day_care_application.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4737/files/wolf_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4486/files/cambridge_english_grammar_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/40030299914.pdf
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/google_ip_address.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/sarajevo_haggadah.pdf
    • https://cdn.shopify.com/s/files/1/0433/8017/9107/files/99334892301.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_off00005e12.bin
be06a5c1840777bb81c5240c41407e81d248b8ff9023bf2e22075eb536405f61
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E12 5380 bytes
font_01_sfnt_off00007054.bin
1580d6e227e3bd0aaefa316b9ecab15cea4d043b58c4c9da15ea7d98e5a2f1d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7054 10020 bytes