Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d77711c781e89b6…

MALICIOUS

PDF

42.5 KB Created: 2020-10-02 02:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ce93707d480461757aa70864444c59a SHA-1: 4fca78b301bf994f334a517721334e76e47d1eb7 SHA-256: 5d77711c781e89b60c85ceedf57c5679f4c21b711ea9ed444449a1a6bb2372f0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which are designed to appear as legitimate PDF files hosted on various platforms. However, one of the primary links, 'https://cctraff.ru/strik?keyword=478+breathing+exercise+pdf', is identified as a known malicious redirector. The document's structure and the presence of numerous links suggest an attempt to create a link farm for SEO poisoning or to direct users to malicious content, likely for phishing or malware distribution.

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://cctraff.ru/strik?keyword=478+breathing+exercise+pdf
    • http://files.tranbcreative.com/uploads/1/3/1/6/131606890/tubijaze.pdf
    • http://masisijox.sgfbeef.com/uploads/1/3/0/8/130874592/tufafotekotumob.pdf
    • http://rizubi.helpingchildrenworldwide.org/uploads/1/3/2/7/132740718/4217415.pdf
    • http://files.simplycheesecakesandmore.com/uploads/1/3/2/6/132682640/a73f8.pdf
    • http://files.josefulgencio.com/uploads/1/3/1/3/131398369/6591387.pdf
    • http://files.kookydoughco.com/uploads/1/3/0/7/130740480/sewup_kuwiz_putozozi_zameselij.pdf
    • http://files.asampoh.com/uploads/1/3/0/7/130776131/betevedugago_sikovebulek.pdf
    • http://xivozos.vbesptu.com/uploads/1/3/1/0/131070458/tipabofejunadajata.pdf
    • http://zulowus.strotherlab.ca/uploads/1/3/2/8/132815176/tidorezosaluni_rajobijizot.pdf
    • http://files.gemmalofthouse.com/uploads/1/3/0/7/130776131/fiwovukogamar-dinud-depajuvuruvosa-gadoguto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/jojo_meme_song_roblox_id.pdf
    • https://cdn.shopify.com/s/files/1/0432/2633/3351/files/32031000030.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/benarerofuwap.pdf
    • https://uploads.strikinglycdn.com/files/267123b3-1974-4f41-b704-7eed39059e33/25403240820.pdf
    • https://uploads.strikinglycdn.com/files/afcb3cc1-55fb-4448-9e15-1bedafbf5931/rugubaxu.pdf
    • https://uploads.strikinglycdn.com/files/d8bfbe2c-ac9b-4d04-bc25-54795c21ec1e/52199467322.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_off00006765.bin
8a57021f34b9ddb64355f1c37ee417d915d530d9705d0573891528406cd7fc82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6765 5860 bytes
font_01_sfnt_off00007b63.bin
d0a25df5db9d5df87886d06b0c96750426cc2409b41b405fefda2f64acc2e439		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B63 9736 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.